@Book{Dehm1934,
author  = "Dehm, Richard",
title   = "Untersuchungen an Cystoideen des rheinischen Unterdevons",
year    = "1934",
address = "München",
series  = "Sitzungsberichte",
volume  = "1934,2",
url     = "https://publikationen.badw.de/de/003394977",
}