Record of life
By: Duncan J. McGregor and Bruno C. Petsch ; ill. by Denis Johnson
Contributors: Petsch, Bruno C. (Bruno Carl), 1901-1981, author
Series: South Dakota Geological Survey. Educational series 2; Educational series (South Dakota Geological Survey) -- 2.
Publisher: Science Center, University of South Dakota
Published: 1968
Place of publication: Vermillion
Language: eng
Number of pages: 38
Subjects: Paleontology
Notes: Cover title.