TY  - RPRT
TI  - Map showing mines, prospects, and areas of significant silver, lead, and zinc production in the Aspen quadrangle, Pitkin County, Colorado
AU  - Bruce Bryant
PY  - 1972
DO  - 10.3133/i785d
UR  - https://pubs.usgs.gov/publication/i785D
ID  - i785D
ER  -