Geological survey of Illinois
By: A.H. Worthen, director ... Published by the authority of the legislature of Illinois
Contributors: Worthen, Amos Henry, 1813-1888; Lindahl, Josua, 1844-1912; Illinois. State Geologist
Publisher: State Journal Steam Press
Published: 1866
Place of publication: Springfield, Ill
Format: Electronic resource
Subjects: Geology -- Illinois; Paleontology -- Illinois