@phdthesis{Plessen1997,
  author    = {Plessen, Hans-Gerrit},
  title     = {Analytik und Geochemie der Platingruppenelemente in magmatischen Gesteinen},
  pages     = {I, 135 S. : Ill., graph. Darst.},
  year      = {1997},
  language  = {de}
}