	*(1918) Geology and mineral deposits of the Colville Indian Reservation, Washington. Bulletin* Vol. 677. US Geological Survey doi:10.3133/b677**	Report (volume)
	............................................... Area and location...................................................................... 50 History of mining............................................................................ 54 Condition of the mining industry.................................................................. 56 Nespelem (Moses) district............................................. ............................... 58 Production and mining conditions. ................................. 59
	*Eckel, E.B. (1949) Geology and ore deposits of the La Plata district, Colorado. Professional Paper* 219. US Geological Survey doi:10.3133/pp219**	Report (issue)
	Geology and Ore Deposits of the La Plata District Colorado By EDWIN B. ECKEL with sections by J. S. WILLIAMS...Geological Survey Board and the Colorado Metal Mining Fund UNITED STATES GOVERNMENT PRINTING OFFICE...the Animas River. _ _ _ Lithology in La Plata district _ _______ Permian system____________________________...part of district -_ _. ..____'_ Northwestern part of district--------Southern part of district. ______...region as a whole __________________ La Plata district _ . ___ _ ____-____ _ 22 23 23 24 24 26 26 26

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Chalcocite from Victor Prospect, Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USA