Title: Endosiphuncular structures in Ordovician and Silurian cephalopods
First published: 1974
Subjects: Cephalopoda, Fossil, Fossil Cephalopoda, Paleontology
Places: North America
Time periods: Ordovician, Silurian
LC classification: QE701 .K33 no. 71, QE806 .K33 no. 71