TY  - RPRT
TI  - Digital mining claim density map for federal lands in Colorado: 1996
AU  - Paul C. Hyndman
AU  - Harry W. Campbell
PY  - 1999
DO  - 10.3133/ofr99410
UR  - https://pubs.usgs.gov/publication/ofr99410
ID  - ofr99410
ER  -