@article{Biener1985,
  author    = {Biener, Ernst},
  title     = {Rehabilitation of old gravity dams},
  series = {[Transactions] : proceedings of fifteenth international congress on large dams ; 24 - 28 Juin 1985, Lausanne, Suisse = Quinzieme Congres International des Grands Barrages. - Bd. 4},
  journal   = {[Transactions] : proceedings of fifteenth international congress on large dams ; 24 - 28 Juin 1985, Lausanne, Suisse = Quinzieme Congres International des Grands Barrages. - Bd. 4},
  publisher = {Intern. Commission on Large Dams},
  address   = {Paris},
  pages     = {Q 59, R.2, S. 21 -- 23},
  year      = {1985},
  language  = {en}
}
@article{SparlaWueller1985,
  author    = {Sparla, Peter and W{\"u}ller, Herbert},
  title     = {QL 300 D, ein Nivelliersystem mit Halbleiterlaserdiode},
  series = {Der Vermessungsingenieur. 36 (1985), H. 1},
  journal   = {Der Vermessungsingenieur. 36 (1985), H. 1},
  isbn      = {0042-4099},
  pages     = {2 -- 4},
  year      = {1985},
  language  = {de}
}
@book{BaltzerKayserLeven1985,
  author    = {Baltzer, Wolfgang and Kayser, Hans J. and Leven, Wilhelm},
  title     = {Zul{\"a}ssigkeit und Einsatzkriterien von Ein- und Ausfahrten in Tunneln / H. J. Kayser; W. Baltzer; W. Leven. Lehrstuhl u. Inst. f{\"u}r Strassenwesen, Erd- u. Tunnelbau, RWTH Aachen},
  publisher = {Lehrstuhl u. Inst. f{\"u}r Strassenwesen, Erd- u. Tunnelbau, RWTH},
  address   = {Aachen},
  isbn      = {3-925163-02-6},
  pages     = {II, 155, 50 S. : Ill., graph. Darst.},
  year      = {1985},
  language  = {de}
}