TY  - RPRT
TI  - Copper deposits of part of Helvetia mining district, Pima County, Arizona
AU  - S. C. Creasey
AU  - G.L. Quick
PY  - 1955
DO  - 10.3133/b1027f
UR  - https://pubs.usgs.gov/publication/b1027F
ID  - b1027F
ER  -