Geologic mapping by means of graphic locator
By: by D.J. Varnes
Series: United States. Geological Survey. Circular -- no. 12; Circular (Geological Survey (U.S.)) -- 12.
Publisher: G.P.O.
Published: 1946
Place of publication: Washington, D.C
Language: eng
Subjects: Geology; Maps; Cartography
Other titles: Graphic locator.
Notes: Cover title.

At head of title: U.S. Dept. of the Interior ... Geological survey ...