@book{Frings1975,
  author    = {Frings, Michael},
  title     = {Der Einfluss privatrechtlicher Staatsvertraege und nationaler Rechtsordnungen auf den internationalen Luftbefoerderungsvertrag},
  pages     = {XV, 113 S.},
  year      = {1975},
  language  = {de}
}
@book{Maether1975,
  author    = {Maether, Christiane},
  title     = {Christiane Maether, Zeichnungen},
  address   = {Baden-Baden},
  pages     = {32 S. : {\"u}berw. Ill.},
  year      = {1975},
  language  = {de}
}
@phdthesis{Alt1975,
  author    = {Alt, Helmut},
  title     = {Beitrag zur Spannungs-Blindleistungsregelung mit gesteuerten Netzkennlinien},
  address   = {Aachen},
  pages     = {163 S.},
  year      = {1975},
  language  = {de}
}
@inproceedings{Pawelke1975,
  author    = {Pawelke, Siegfried},
  title     = {Approximationstheorie mit Hilfe von Jacobi-Polynomen und Kugelfunktionen},
  series = {Proceedings of the conference jointly organized by the Mathematical Institute of the Polish Academy of Sciences and the Institute of Mathematics of the Adam Mickiewicz University, held in Poznan, 22-26 August, 1972},
  booktitle = {Proceedings of the conference jointly organized by the Mathematical Institute of the Polish Academy of Sciences and the Institute of Mathematics of the Adam Mickiewicz University, held in Poznan, 22-26 August, 1972},
  editor    = {Ciesielski, Zbigniew},
  publisher = {Reichel},
  address   = {Dordrecht},
  isbn      = {90-277-0483-X},
  pages     = {157 -- 173},
  year      = {1975},
  language  = {de}
}