TY  - RPRT
TI  - Mineral resources of the Black Rock Wilderness Study Area, Graham County, Arizona
AU  - Frank S. Simons
AU  - P. K. Theobald
AU  - R.R. Tidball
AU  - J. A. Erdman
AU  - T. F. Harms
AU  - Andrew Griscom
AU  - G. S. Ryan
PY  - 1987
DO  - 10.3133/b1703c
UR  - https://pubs.usgs.gov/publication/b1703C
ID  - b1703C
ER  -