Coal resources of Montana,
Combo, John Xavier, 1922-
Coal resources of Montana, by John X. Combo [and others] - Washington, 1949. - 28 p. : illus. ; 27 cm.
Cover title.
"Selected bibliography": p. 24-26.
gs 50000137
Coal--Montana.
Coal mines and mining--Montana.
QE75 / .C5 no. 53
Coal resources of Montana, by John X. Combo [and others] - Washington, 1949. - 28 p. : illus. ; 27 cm.
Cover title.
"Selected bibliography": p. 24-26.
gs 50000137
Coal--Montana.
Coal mines and mining--Montana.
QE75 / .C5 no. 53