TY  - RPRT
TI  - Geology and mineral deposits of the Poncha Springs NE quadrangle, Chaffee County, Colorado
AU  - Ralph Erskine Van Alstine
AU  - D. C. Cox
PY  - 1969
DO  - 10.3133/pp626
UR  - https://pubs.usgs.gov/publication/pp626
ID  - pp626
ER  -