References Detail back created at: 2009-10-03 Media Type: Article in Journal Author Schmidt, Alfred Year: 1934 Title: Über die Entstehung sog. "Knöpfe" in altsteinzeitlichen Fundschichten Volume: 26 Page No: 204-211 JournalMannus Keywords Time Period Late Palaeolithic European timeline Palaeolithic Super Region Europe Theme chaine d'operation, experimentation Assemblage Type cave Material bone Miscellaneous worked bone Taphonomy fracture patterns Further Information Location: Knochenarbeit back