Pennsylvanian invertebrates of the Mazon Creek area, Illinois
Subtitle: Eurypterida
By: Erik N. Kjellesvig-Waering --
Contributors: Chicago Natural History Museum.
Series: Fieldiana -- v. 12, no. 6; Chicago Natural History Museum. Publication 973; Publication (Chicago Natural History Museum) -- 973.
Publisher: Chicago Natural History Museum Press
Published: 1963
Place of publication: [Chicago]
Subjects: Eurypterida.; Paleontology -- Pennsylvanian.; Paleontology -- Illinois.