TY  - RPRT
TI  - Geologic map of the Powderhorn quadrangle, Gunnison and Saguache Counties, Colorado
AU  - David Carl Hedlund
AU  - Jerry Chipman Olson
PY  - 1975
DO  - 10.3133/gq1178
UR  - https://pubs.usgs.gov/publication/gq1178
ID  - gq1178
ER  -