00881cam a22002411 4500 gs 19000332 DLC 20260227111323.0 760409s1919 xx 000 0 eng gs 19000332 (OCoLC)2103950 DLC TxEU DLC premarc QE91 .A4 no. 15 Muilenburg, G. A. (Garrett A.), 1889- Manganese deposits of Colorado, by G. A. Muilenburg. Denver, Colo., Eames brothers, state printers, 1919. 3 p. l., 76 p. 23 cm. Colorado Geological Survey. Bulletin, 15 "Bibliography on the occurrence, geology, and mining of manganese, with some references on its metallurgy and uses, comp. by Harold L. Wheeler": p. 54-69. Manganese ores Colorado. Wheeler, Harold Leslie, comp. 25951 25951