TY  - RPRT
TI  - Geologic and structural maps and sections of the Marshall Pass Mining District, Saguache, Gunnison, and Chaffee counties, Colorado
AU  - J. C. Olson
PY  - 1983
DO  - 10.3133/i1425
UR  - https://pubs.usgs.gov/publication/i1425
ID  - i1425
ER  -