Geophysical methods of prospecting
Subtitle: A brief and elementary account of the principles involved
By: by A.S. Eve and D.A. Keys ...
Contributors: Keys, D. A. (David Arnold), 1890-1977, author
Series: [U.S.] Bureau of Mines. Technical paper -- 420; Technical paper (United States. Bureau of Mines) -- 420
Publisher: U.S. Govt. Print. Off.
Published: 1927
Place of publication: Washington
Language: eng
Number of pages: 26
Subjects: Prospecting
Notes: At head of title: ... Department of Commerce. Herbert Hoover, secretary. Bureau of Mines. Scott Turner, director.

Bibliography: p. 26.