TY  - RPRT
TI  - Precambrian deposits of zinc-copper-lead sulfides and zinc spinel (gahnite) in Colorado
AU  - Douglas M. Sheridan
AU  - William H. Raymond
PY  - 1984
DO  - 10.3133/b1550
UR  - https://pubs.usgs.gov/publication/b1550
ID  - b1550
ER  -