@article{BienerSasse1988,
  author    = {Biener, Ernst and Sasse, T.},
  title     = {Experience with new techniques in slurry cutoff wall construction},
  series = {ISWA 88, proceedings of the 5th International Solid Wastes Conference : September 11 - 16th, 1988, Copenhagen, Denmark / ed. by Lizzi Andersen ... - Vol. 1 : Oral presentations},
  journal   = {ISWA 88, proceedings of the 5th International Solid Wastes Conference : September 11 - 16th, 1988, Copenhagen, Denmark / ed. by Lizzi Andersen ... - Vol. 1 : Oral presentations},
  publisher = {Acad. Press},
  address   = {London [u.a.]},
  isbn      = {0-12-058451-4},
  pages     = {41 -- 46},
  year      = {1988},
  language  = {en}
}
@article{SparlaKampmannWitte1988,
  author    = {Sparla, Peter and Kampmann, G. and Witte, B.},
  title     = {M{\"o}glichkeiten und Probleme der reflektorlosen Distanzmessung gezeigt am Beispiel des Wild DIOR 3002},
  series = {Ingenieurvermessung 88 : Beitr{\"a}ge zum 10. Internationalen Kurs f{\"u}r Ingenieurvermessung, M{\"u}nchen, 12. - 17. 9. 1988 / Veranst.: Heinrich Ebner},
  journal   = {Ingenieurvermessung 88 : Beitr{\"a}ge zum 10. Internationalen Kurs f{\"u}r Ingenieurvermessung, M{\"u}nchen, 12. - 17. 9. 1988 / Veranst.: Heinrich Ebner},
  publisher = {D{\"u}mmler},
  address   = {Bonn},
  year      = {1988},
  language  = {de}
}
@book{Paschmann1988,
  author    = {Paschmann, Hans},
  title     = {Untersuchungen zum fr{\"u}hen Verformungsverhalten des Betons},
  pages     = {Getr. Z{\"a}hlung : zahlr. graph. Darst.},
  year      = {1988},
  language  = {de}
}