00762cam a22002171 4500 gs 10000454 DLC 20260227111310.0 760408s1910 xx 000 0 eng gs 10000454 (OCoLC)2101780 DLC TxEU DLC premarc QE91 .A4 vol. 1 Crawford, R. D. (Ralph Dixon), 1873- A preliminary report on the geology of the Monarch mining district, Chaffee County, Colorado, by R. D. Crawford. [Denver, Colo., The Smith-Brooks printing company, state printers , 1910] 78 p. 3 fold. pl., 2 fold. maps, diagrs. 23 cm. Colorado Geological Survey. Bulletin, 1 Geology Colorado. 24942 24942