Directory of geological material in North America
Contributors: Levorsen, A. I. 1894-1965.
Edition: 2d ed., rev. and enl.
Series: NAS-NRC publication no. 556
Publisher: American Geological Institute
Published: 1957
Place of publication: Washington
Language: eng
Number of pages: 208
Subjects: Geology -- Directories
Other titles: Geological material in North America