TY  - RPRT
TI  - Contributions to economic geology, 1920, Part I, Metals and nonmetals except fuels--Some deposits of manganese ore in Colorado
AU  - E. L. Jones
PY  - 1921
DO  - 10.3133/b715d
UR  - https://pubs.usgs.gov/publication/b715D
ID  - b715D
ER  -