@article{HelsperMoelterWillemer1987,
  author    = {Helsper, Christoph and M{\"o}lter, W. and Willemer, W.},
  title     = {Fast and Automated Testing of Filter Media / M{\"o}lter, W. ; Helsper, C. ; Willemer, W.},
  series = {FILTECH Conference 1987 : Utrecht, Holland; September 23 - 25 1987 / org. by the Filtration Society , Vol. 1.},
  journal   = {FILTECH Conference 1987 : Utrecht, Holland; September 23 - 25 1987 / org. by the Filtration Society , Vol. 1.},
  publisher = {Filtration Society},
  address   = {Loughborough},
  pages     = {106 -- 112},
  year      = {1987},
  language  = {en}
}
@article{HelsperMoelter1987,
  author    = {Helsper, Christoph and M{\"o}lter, W.},
  title     = {Determination and Neutralization of the Charge Produced by the Dispersion of Powders},
  series = {Journal of Aerosol Science. 18 (1987), H. 6},
  journal   = {Journal of Aerosol Science. 18 (1987), H. 6},
  isbn      = {0021-8502},
  pages     = {877 -- 880},
  year      = {1987},
  language  = {de}
}
@article{HelsperBartz1987,
  author    = {Helsper, Christoph and Bartz, H.},
  title     = {Theoretische Bestimmung des Abscheidegrades eines Filters bei verschiedenen Betriebszust{\"a}nden / Bartz, H. ; Helsper, C.},
  series = {Staub, Reinhaltung der Luft. 47 (1987)},
  journal   = {Staub, Reinhaltung der Luft. 47 (1987)},
  isbn      = {0039-0771},
  pages     = {112 -- 114},
  year      = {1987},
  language  = {de}
}
@book{Hegewald1987,
  author    = {Hegewald, Ulf},
  title     = {Ulf Hegewald / hrsg. von Marianne Hennemann},
  publisher = {Galerie Hennemann},
  address   = {Bonn},
  isbn      = {3-88482-032-X},
  pages     = {88 S. : {\"u}berw. Ill.},
  year      = {1987},
  language  = {de}
}
@article{Heger1987,
  author    = {Heger, Michael},
  title     = {Studienfachwahl, Studienmotivation und Berufsorientierung im Ingenieur-Grundstudium. Ergebnisse aus Untersuchungen an der TH Aachen},
  series = {Blockierte Zukunft. Reaktionen von Studierenden und Lehrenden / hrsg. von Werner Habel ...},
  journal   = {Blockierte Zukunft. Reaktionen von Studierenden und Lehrenden / hrsg. von Werner Habel ...},
  publisher = {Dt. Studien-Verl.},
  address   = {Weinheim},
  isbn      = {3-89271-064-3},
  pages     = {279 -- 296},
  year      = {1987},
  language  = {de}
}
@article{HagemannOBryan1987,
  author    = {Hagemann, Hans-J{\"u}rgen and O´Bryan, H. M.},
  title     = {Grain boundary and surface segragation of Ba-Ti-O-Phases in rutile. O´Bryan, H. M.; Hagemann, H. J.},
  series = {Journal of the American Ceramic Society. 70 (1987)},
  journal   = {Journal of the American Ceramic Society. 70 (1987)},
  isbn      = {0002-7820},
  pages     = {274 -- 278},
  year      = {1987},
  language  = {en}
}
@book{Grueters1987,
  author    = {Gr{\"u}ters, Hugo},
  title     = {Mechanik: Vorlesung},
  publisher = {Becker-Kuns},
  address   = {Aachen},
  pages     = {253 S.: zahlr. graph. Darst.},
  year      = {1987},
  language  = {de}
}
@book{Grueters1987,
  author    = {Gr{\"u}ters, Hugo},
  title     = {Aufgabensammlung Mechanik / von Hugo Gr{\"u}ters},
  publisher = {Becker-Kuns},
  address   = {Aachen},
  pages     = {Getr. Z{\"a}hlung : graph. Darst.},
  year      = {1987},
  language  = {de}
}
@book{Grap1987,
  author    = {Grap, Rolf Dietmar},
  title     = {Bestimmung der wirtschaftlichen Anzahl von Handhabungssystemen f{\"u}r die Pralinenverpackung f{\"u}r die Firma Chocoladenfabriken Lindt \& Spr{\"u}ngli GmbH: Projektergebnisbericht},
  publisher = {IAW - Lehrstuhl und Institut f{\"u}r Arbeitswissenschaft der RWTH Aachen},
  address   = {Aachen},
  year      = {1987},
  language  = {de}
}
@book{Grap1987,
  author    = {Grap, Rolf Dietmar},
  title     = {Konzeption eines EDV-Systems f{\"u}r die Auftragsabwicklung im Bereich der Weiterverarbeitung der Thyssen-Henrichsh{\"u}tte nach software-ergonomischen Kriterien},
  publisher = {IAW - Lehrstuhl und Institut f{\"u}r Arbeitswissenschaft der RWTH},
  address   = {Aachen},
  year      = {1987},
  language  = {de}
}
@misc{GrafGrossSponagel1987,
  author    = {Graf, G{\"u}nter and Groß, Heinz and Sponagel, Stefan},
  title     = {Verfahren zur Herstellung eines Dichtringes mit einer Dichtlippe : Patentschrift DE3621241C1 ; Ver{\"o}ffentlichungstag der Patenterteilung : 25.06.1987},
  publisher = {Deutsches Patent- und Markenamt},
  address   = {M{\"u}nchen},
  pages     = {5 S. : Ill.},
  year      = {1987},
  language  = {de}
}
@article{GerlingLueckPredel1987,
  author    = {Gerling, Ulrich and L{\"u}ck, Reinhard and Predel, Bruno},
  title     = {Thermodynamische Untersuchungen im System Antimon-Germanium-Zink},
  series = {Zeitschrift f{\"u}r Metallkunde : international journal of materials research and advanced techniques. Bd. 78, H. 1},
  journal   = {Zeitschrift f{\"u}r Metallkunde : international journal of materials research and advanced techniques. Bd. 78, H. 1},
  issn      = {0044-3093 ; 0179-4841},
  pages     = {13 -- 18},
  year      = {1987},
  language  = {de}
}
@article{FoersterTulkeLueth1987,
  author    = {F{\"o}rster, Arnold and Tulke, A. and L{\"u}th, H.},
  title     = {The Schottky barrier at the InSb(110)-Sn interface},
  series = {Journal of Vacuum Science \& Technology B: Microelectronics and Nanometer Structures. 5 (1987), H. 4},
  journal   = {Journal of Vacuum Science \& Technology B: Microelectronics and Nanometer Structures. 5 (1987), H. 4},
  isbn      = {1071-1023},
  pages     = {1054 -- 1056},
  year      = {1987},
  language  = {en}
}
@article{FoersterLueth1987,
  author    = {F{\"o}rster, Arnold and L{\"u}th, H.},
  title     = {Investigation of the InSb(110)-Sn schottky barrier by means of electron energy loss spectroscopy},
  series = {Surface Science. 189-190 (1987)},
  journal   = {Surface Science. 189-190 (1987)},
  isbn      = {0039-6028},
  pages     = {307 -- 314},
  year      = {1987},
  language  = {en}
}
@article{Frings1987,
  author    = {Frings, Michael},
  title     = {Rechtswirkungen eines Auslandskonkurses f{\"u}r Inlandsforderungen, LG Aachen},
  series = {Neue juristische Wochenschrift : NJW / NJW-Rechtsprechungs-Report Zivilrecht : NJW-RR (1987)},
  journal   = {Neue juristische Wochenschrift : NJW / NJW-Rechtsprechungs-Report Zivilrecht : NJW-RR (1987)},
  isbn      = {0179-4043},
  pages     = {502},
  year      = {1987},
  language  = {de}
}
@article{Frings1987,
  author    = {Frings, Michael},
  title     = {Vertragsstrafenklausel in Automatenaufstellvertr{\"a}gen, LG Aachen},
  series = {Neue juristische Wochenschrift : NJW / NJW-Rechtsprechungs-Report Zivilrecht : NJW-RR (1987)},
  journal   = {Neue juristische Wochenschrift : NJW / NJW-Rechtsprechungs-Report Zivilrecht : NJW-RR (1987)},
  isbn      = {0179-4043},
  pages     = {948},
  year      = {1987},
  language  = {de}
}
@article{ElbersRemmeLehmann1987,
  author    = {Elbers, Gereon and Remme, S. and Lehmann, G.},
  title     = {EPR and Optical Absorption of Cr3+ in CsCl and CsBr},
  series = {Physica Status Solidi (B). 142 (1987), H. 2},
  journal   = {Physica Status Solidi (B). 142 (1987), H. 2},
  isbn      = {0031-8957},
  pages     = {367 -- 377},
  year      = {1987},
  language  = {en}
}
@article{DoerenWernicke1987,
  author    = {D{\"o}ren, Horst-Peter and Wernicke, K.},
  title     = {Slijtvaste lagen door oplassen met plasmapoeder},
  series = {Metaal en Kunststof: MK. Universeel weekblad voor fabriek en werkplaats. 24 (1987), Nr. 23},
  journal   = {Metaal en Kunststof: MK. Universeel weekblad voor fabriek en werkplaats. 24 (1987), Nr. 23},
  issn      = {0026-0460},
  pages     = {76 -- 79},
  year      = {1987},
  language  = {nl}
}
@incollection{DoerenPlaschkaPohl1987,
  author    = {D{\"o}ren, Horst-Peter and Plaschka, K. and Pohl, M.},
  title     = {Die Untersuchung von Schutzgasschweißdr{\"a}hten mit Hilfe des Rasterelektronenmikroskops},
  series = {Fortschritte in der Metallographie. Berichte der 7. Internationalen Metallographie-Tagung Leoben 15. bis 17. Oktober 1986. Sonderb{\"a}nde der Praktischen Metallographie. 18},
  booktitle = {Fortschritte in der Metallographie. Berichte der 7. Internationalen Metallographie-Tagung Leoben 15. bis 17. Oktober 1986. Sonderb{\"a}nde der Praktischen Metallographie. 18},
  publisher = {Riederer},
  address   = {Stuttgart},
  issn      = {0343-3579},
  pages     = {333 -- 345},
  year      = {1987},
  language  = {de}
}
@incollection{Doeren1987,
  author    = {D{\"o}ren, Horst-Peter},
  title     = {Nichtrostende St{\"a}hle},
  series = {Jahrbuch Schweißtechnik. 1988},
  booktitle = {Jahrbuch Schweißtechnik. 1988},
  publisher = {Dt. Verl. f{\"u}r Schweißtechnik (DVS)},
  address   = {D{\"u}sseldorf},
  isbn      = {0935-0292},
  pages     = {188 -- 203},
  year      = {1987},
  language  = {de}
}