@book{
  author = "Heidegger, Martin, 1889-1976, Boss, Medard, 1903-1990",
  title = "Zollikoner Seminare : Protokolle - Zwiegespräche - Briefe",
  year: c1994
  publisher = "V. Klostermann",
  address = "Frankfurt am Main",
  edition = "2. Aufl",
  ISSN/ISBN = "9783465026709 [3465026705] (: kart)",
  ISSN/ISBN = "9783465026716 [3465026713] (: Gewebe)",
}