00755cam a22002411i 4500 gs 09000437 DLC 20260227111309.0 790324s1909 dcua f000 0 eng gs 09000437 (OCoLC)4774312 DLC OkAdE ICharE DLC n-us-mt TN805.M9 C2 TN805.M9 C2 Copy 2. Calvert, William R. Geology of the Lewistown coal field, Montana / by W.R. Calvert. Washington : Government Printing Office, 1909. 83 p. : ill., 5 plates (incl. 2 fold. maps) ; 23 cm. United States. Geological Survey. Bulletin ; 390 Geology Montana. Coal Montana. 24875 24875