@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}
}
@article{LassonczykWiechmann1987,
  author    = {Lassonczyk, Beate and Wiechmann, H.},
  title     = {Untersuchungen zum Akkumulationsverhalten l{\"o}slicher organischer Substanzen in Podsolen},
  series = {Mitteilungen der Deutschen Bodenkundlichen Gesellschaft. 55 (1987)},
  journal   = {Mitteilungen der Deutschen Bodenkundlichen Gesellschaft. 55 (1987)},
  isbn      = {0343-107x},
  pages     = {791 -- 796},
  year      = {1987},
  language  = {de}
}
@article{PrielmeierLangRadkowitschetal.1987,
  author    = {Prielmeier, Franz and Lang, E. W. and Radkowitsch, H. and L{\"u}demann, H.-D.},
  title     = {High Pressure NMR Study of the Molecular Dynamics of Liquid methyl fluoride and deutero-methyl fluoride / Lang, E. W. ; Prielmeier, F. X. ; Radkowitsch, H. ; L{\"u}demann, H. D.},
  series = {Berichte der Bunsen-Gesellschaft f{\"u}r Physikalische Chemie. 91 (1987), H. 10},
  journal   = {Berichte der Bunsen-Gesellschaft f{\"u}r Physikalische Chemie. 91 (1987), H. 10},
  isbn      = {0005-9021},
  pages     = {1017 -- 1025},
  year      = {1987},
  language  = {en}
}
@article{PrielmeierLangRadkowitschetal.1987,
  author    = {Prielmeier, Franz and Lang, E. W. and Radkowitsch, H. and L{\"u}demann, H. D.},
  title     = {High Pressure NMR Study of the Molecular Dynamics of Liquid fluoroform and deutero-fluoroform / Lang, E. W. ; Prielmeier, F. X. ; Radkowitsch, H. ; L{\"u}demann, H. D.},
  series = {Berichte der Bunsen-Gesellschaft f{\"u}r Physikalische Chemie. 91 (1987), H. 10},
  journal   = {Berichte der Bunsen-Gesellschaft f{\"u}r Physikalische Chemie. 91 (1987), H. 10},
  isbn      = {0005-9021},
  pages     = {1025 -- 1033},
  year      = {1987},
  language  = {en}
}
@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}
}
@book{MerschenzQuack1987,
  author    = {Merschenz-Quack, Angelika},
  title     = {Halogenide und Hydrate von Oxos{\"a}uren des Schwefels : Beitr. zur Kristall- u. Strukturchemie},
  address   = {D{\"u}sseldorf},
  pages     = {104 S. : zahlr. Ill., graph. Darst.},
  year      = {1987},
  language  = {de}
}
@book{Lassonczyk1987,
  author    = {Lassonczyk, Beate},
  title     = {Immobilisierung l{\"o}slicher organischer Stoffe aus Auflagehorizonten in Sandb{\"o}den},
  address   = {Bonn},
  pages     = {140 S. : graph. Darst.},
  year      = {1987},
  language  = {de}
}
@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}
}
@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}
}