TY  - RPRT
TI  - Reported occurrences of selected minerals in Colorado: Includes most metals and nonmetals; does not include mineral fuels, sodium and potassium salts, or phosphate
AU  - Conservation Division Branch of Mineral Classification
PY  - 1971
DO  - 10.3133/mr57
UR  - https://pubs.usgs.gov/publication/mr57
ID  - mr57
ER  -