The National Center of the U.S. Geological Survey.
Publisher: Department of the Interior, Geological Survey; for sale by the Superintendent of Documents, U.S. Government Printing Office
Published: 1974
Place of publication: Washington, D.C
Language: eng
Number of pages: 32
Subjects: Geological Survey (U.S.); Geology -- United States
Notes: "USGS: INF-74-25"--Cover.