Ore deposits of the Helena mining region, Montana
By: by Adolph Knopf.
Series: U.S. Geological survey. Bulletin 527
Publisher: Govt. Print. Off.
Published: 1913
Place of publication: Washington
Language: eng
Number of pages: 143
Subjects: Mines and mineral resources -- Montana.; Geology -- Montana.
Notes: Some of the plates printed on both sides of leaf.
"Literature": p. 18-19.
Includes index.