TY  - RPRT
TI  - Geologic map of the Spar City quadrangle, Mineral County, Colorado
AU  - Thomas August Steven
AU  - Peter W. Lipman
PY  - 1973
DO  - 10.3133/gq1052
UR  - https://pubs.usgs.gov/publication/gq1052
ID  - gq1052
ER  -