@book{Dienst1991,
  author    = {Dienst, Karl-Jakob},
  title     = {Formeln f{\"u}r das Weggr{\"o}ssenverfahren / K. J. Dienst. Fachhochschule Aachen, Fachbereich Bauingenieurwesen. [Hrsg.: Rektor der Fachhochschule Aachen mit Sozialwerk Bauh{\"u}tte e.V.]},
  publisher = {Fachhochschule Aachen, Fachbereich Bauingenieurwesen},
  address   = {Aachen},
  pages     = {100 S. : graph. Darst.},
  year      = {1991},
  language  = {de}
}
@article{Siebel1991,
  author    = {Siebel, Lothar},
  title     = {Schallschutz von Trenndecken},
  series = {DBZ Deutsche Bauzeitschrift. 39 (1991), H. 12},
  journal   = {DBZ Deutsche Bauzeitschrift. 39 (1991), H. 12},
  isbn      = {0011-4782},
  pages     = {1795 -- 1799},
  year      = {1991},
  language  = {de}
}
@article{BienerSasse1991,
  author    = {Biener, Ernst and Sasse, T.},
  title     = {Herstellen von Deponieabdichtungen},
  series = {Standard-Abdichtungssysteme f{\"u}r Deponiebauwerke : Seminarunterlagen},
  journal   = {Standard-Abdichtungssysteme f{\"u}r Deponiebauwerke : Seminarunterlagen},
  publisher = {Haus der Technik, Essen},
  address   = {Essen},
  pages     = {1 -- 17},
  year      = {1991},
  language  = {de}
}
@article{BienerSasse1991,
  author    = {Biener, Ernst and Sasse, T.},
  title     = {Altlasten-Bewertung bei Investitionsentscheidungen},
  series = {Bremer Unternehmer (1991)},
  journal   = {Bremer Unternehmer (1991)},
  pages     = {S. 27},
  year      = {1991},
  language  = {de}
}
@article{Hoettges1990,
  author    = {H{\"o}ttges, J{\"o}rg},
  title     = {Turbulence and Mixing Mechanics in Compound Open Channel Flow / Arnold, Uwe; H{\"o}ttges, J{\"o}rg; Rouv{\´e}, Gerhard},
  series = {On cutoff ratios of curved channels : paper presented at the 23rd Congress of the IAHR, Ottawa, Canada, August 21 - 25, 1989 / G. J. Klaassen; B. H. J.van Zanten},
  journal   = {On cutoff ratios of curved channels : paper presented at the 23rd Congress of the IAHR, Ottawa, Canada, August 21 - 25, 1989 / G. J. Klaassen; B. H. J.van Zanten},
  publisher = {Delft Hydraulics},
  address   = {Delft},
  year      = {1990},
  language  = {en}
}
@book{Kettern1990,
  author    = {Kettern, J{\"u}rgen},
  title     = {Untersuchungen zur biologisch-chemisch-physikalischen Behandlung von Deponiesickerw{\"a}ssern},
  publisher = {Ges. zur F{\"o}rderung d. Siedlungswasserwirtschaft an d. RWTH},
  address   = {Aachen},
  pages     = {XIV, 184, [71] S : Ill. u. graph. Darst + 73 Ill.},
  year      = {1990},
  language  = {de}
}
@article{BienerSasse1990,
  author    = {Biener, Ernst and Sasse, T.},
  title     = {Hydraulische Maßnahmen zur Altlastensanierung},
  series = {Behandlung und Sicherung von Abfalldeponien und Altlasten : [Seminar] / Technische Akademie Wuppertal},
  journal   = {Behandlung und Sicherung von Abfalldeponien und Altlasten : [Seminar] / Technische Akademie Wuppertal},
  publisher = {Technische Akademie Wuppertal},
  address   = {Wuppertal},
  pages     = {1 -- 10},
  year      = {1990},
  language  = {de}
}
@article{BienerSasse1990,
  author    = {Biener, Ernst and Sasse, T.},
  title     = {Herstellen von Deponiedichtungen in ung{\"u}nstigen Witterungsperioden},
  series = {Altlastensanierung '90 : Dritter Internationaler KFK-TNO-Kongreß {\"u}ber Altlastensanierung ; 10. - 14. Dezember 1990, Karlsruhe, Bundesrepublik Deutschland / Hrsg.: F. Arendt ... - Bd. 2},
  journal   = {Altlastensanierung '90 : Dritter Internationaler KFK-TNO-Kongreß {\"u}ber Altlastensanierung ; 10. - 14. Dezember 1990, Karlsruhe, Bundesrepublik Deutschland / Hrsg.: F. Arendt ... - Bd. 2},
  publisher = {Kluwer},
  address   = {Dordrecht [u.a.]},
  isbn      = {0-7923-1059-4},
  pages     = {1387 -- 1388},
  year      = {1990},
  language  = {de}
}
@book{Kettern1989,
  author    = {Kettern, J{\"u}rgen},
  title     = {Untersuchungen zur biologisch-chemisch-physikalischen Behandlung von Deponiesickerw{\"a}ssern},
  pages     = {XIV, 184 S. m. 72 Abb., 55 Tab., Anl.},
  year      = {1989},
  language  = {de}
}
@article{HoettgesArnoldRouve1989,
  author    = {H{\"o}ttges, J{\"o}rg and Arnold, Uwe and Rouv{\´e}, Gerhard},
  title     = {Combined Digital Image and Finite Element Analysis of Mixing in Compound Open Channel Flow / Arnold, U.; J. H{\"o}ttges; G. Rouv{\´e}},
  series = {Refined flow modelling and turbulence measurements : proceedings of the Third International Symposium Tokyo, Japan 26 - 28 July, 1988 / ed. by Y. Iwasa. Scientific Organizing Committee of the Third International Symposium on Refined Flow Modelling and Tur},
  journal   = {Refined flow modelling and turbulence measurements : proceedings of the Third International Symposium Tokyo, Japan 26 - 28 July, 1988 / ed. by Y. Iwasa. Scientific Organizing Committee of the Third International Symposium on Refined Flow Modelling and Tur},
  publisher = {Universal Acad. Press},
  address   = {Tokyo},
  isbn      = {4-946443-03-7},
  pages     = {569 -- 576},
  year      = {1989},
  language  = {en}
}