TY  - RPRT
TI  - Geologic map of the Poncha Springs SE quadrangle, Chaffee County, Colorado
AU  - R. E. Van Alstine
PY  - 1970
DO  - 10.3133/ofr70350
UR  - https://pubs.usgs.gov/publication/ofr70350
ID  - ofr70350
ER  -