TY  - RPRT
TI  - Copper deposits of a part of the Helvetia mining district, Arizona
AU  - S. C. Creasey
AU  - G.L. Quick
PY  - 1947
DO  - 10.3133/ofr4715
UR  - https://pubs.usgs.gov/publication/ofr4715
ID  - ofr4715
ER  -