TY  - RPRT
TI  - Silver concentrations and selected hydrologic data in the Upper Colorado River basin, 1991-92
AU  - D. A. Johncox
PY  - 1993
DO  - 10.3133/ofr93447
UR  - https://pubs.usgs.gov/publication/ofr93447
ID  - ofr93447
ER  -