TY  - RPRT
TI  - Geology and mineral deposits of the Poncha Springs SE Quadrangle, Chaffee County, Colorado
AU  - Ralph Erskine Van Alstine
PY  - 1974
DO  - 10.3133/pp829
UR  - https://pubs.usgs.gov/publication/pp829
ID  - pp829
ER  -