Montana in the geologic past.
Perry, Eugene S. 1892-
Montana in the geologic past. - Butte, Montana School of Mines, 1962. - vi, 78 p. illus., port., maps (1 fold.) diagrs., tables. 28 cm. - Montana. Bureau of Mines and Geology. Bulletin 26 . - Montana Bureau of Mines and Geology. Bulletin ; 26. .
Bibliography: p. 77-78.
gs 62000273
Geology--Montana.
QE133 / .P46
Montana in the geologic past. - Butte, Montana School of Mines, 1962. - vi, 78 p. illus., port., maps (1 fold.) diagrs., tables. 28 cm. - Montana. Bureau of Mines and Geology. Bulletin 26 . - Montana Bureau of Mines and Geology. Bulletin ; 26. .
Bibliography: p. 77-78.
gs 62000273
Geology--Montana.
QE133 / .P46