Our natural resources
Subtitle: their continuing discovery and human progress
Series: Ohio. Division of Geological Survey. Information circular no. 12; Information circular (Ohio. Division of Geological Survey) -- no. 12
Published: 1953
Place of publication: Columbus
Language: eng
Number of pages: 16
Subjects: Geology -- History; Geology; Natural resources -- United States
Notes: Bownocker lecture, 1952-53