Preliminary maps and reports released by the Geologic Division 1946-1947
Subtitle: and by the Conservation Division 1938-1947
By: By Ruth A. Atherton, Wenonah H. Eckstein and R.E. Spratt
Series: Geological Survey circular -- 56; Geological Survey circular -- 56.
Published: 1949
Place of publication: [Washington]
Language: eng
Number of pages: 54
Subjects: Bibliography; Geology; Geological Survey (U.S.)
Notes: Cover title.