Exploration assistance
Publisher: U.S. Dept. of the Interior, Geological Survey, Office of Minerals Exploration
Published: 1969
Place of publication: [Washington, D.C.?]
Language: eng
Number of pages: 20
Subjects: Geological Survey (U.S.). -- Office of Minerals Exploration; Prospecting -- United States -- Handbooks, manuals, etc; Mines and mineral resources -- United States
Genres: Handbooks, manuals, etc