Geological investigations, map no. 1.
Published: 1957
Place of publication: Butte, Mont
Language: eng
Subjects: Geology -- Montana.
Notes: This series and the Bureau's Miscellaneous contributions combined in new series called Specials publications.
Table of contents: value: no. 1. Geology of the Georgetown Thrust area southwest of Philipsburg, Montana, by Glenn J. Poulter. Text and map. 1957.