Oil and gas in Montana. Revision of 1959. - Perry, Eugene S. (Eugene Sheridan), 1892- (Butte, Montana school of mines, 1960)
Part of illustrative matter in pocket.
"Complete revision of a previous report issued as Memoir 35 in 1953."
Bibliography: p. 85-86.
Keywords: Oil fields -- Montana; Natural gas -- Montana; Geology -- Montana