Septie  me congre  s international de Stratigraphie et de ge ologie Carbonife  re
Subtitle: [held at] Krefeld, 23-28 Aug., 1971: Compte Rendu.
Publisher: Geologisches Landesamt Nordrhein-Westfalen
Published: 1973
Place of publication: Krefeld
Language: eng
Number of pages: 494