TY  - RPRT
TI  - Geologic map of the Poncha Springs NE quadrangle, Chaffee County, Colorado
AU  - R. E. Van Alstine
AU  - D. C. Cox
PY  - 1966
DO  - 10.3133/ofr66145
UR  - https://pubs.usgs.gov/publication/ofr66145
ID  - ofr66145
ER  -