@Book{Oppenheim1903,
author  = "Oppenheim, Paul",
title   = "Ueber die Fossilien der Blättermergel von Theben",
year    = "1903",
address = "München",
series  = "Sitzungsberichte",
volume  = "1902,19",
url     = "https://publikationen.badw.de/de/003388916",
}