The Grenola formation
By: by G. E. Condra and C. E. Busby.
Contributors: Busby, Clarence Edward, 1907- joint author.
Publisher: Printed by the authority of the state of Nebraska
Published: 1933
Place of publication: [Lincoln]
Language: eng
Number of pages: 31
Subjects: Geology -- Nebraska.
Notes: Bibliographical foot-notes.