@book{BlumensteinSchubertGrunewald1994,
  author    = {Blumenstein, Oswald and Schubert, Rudolf and Grunewald, Karsten},
  title     = {Bisherige Ergebnisse der Rieselfeldprojekte und begr{\"u}ndbare Sofortaktivit{\"a}ten},
  publisher = {Univ.},
  address   = {Potsdam},
  pages     = {7 S.},
  year      = {1994},
  language  = {de}
}
@book{BlumensteinSchubertGrunewald1994,
  author    = {Blumenstein, Oswald and Schubert, Rudolf and Grunewald, Karsten},
  title     = {Zur Belastung von Grabensedimenten der Vorfluter im Westteil des Rieselfeldgebietes Berlin-S{\"u}d},
  publisher = {Univ.},
  address   = {Potsdam},
  pages     = {13 S.},
  year      = {1994},
  language  = {de}
}
@book{GrunewaldBechmannBlumenstein1994,
  author    = {Grunewald, Karsten and Bechmann, Wolfgang and Blumenstein, Oswald},
  title     = {Cu, Pb, PAK und PCB- Gehalte der Rieselfeldelemente und -substrate s{\"u}dlich Berlin},
  publisher = {Univ.},
  address   = {Potsdam},
  pages     = {9 S.},
  year      = {1994},
  language  = {de}
}