TY  - RPRT
TI  - Lead isotope compositions as guides to early gold mineralization: The North Amethyst vein system, Creede district, Colorado
AU  - Nora K. Foley
AU  - Robert A. Ayuso
PY  - 1994
DO  - 10.2113/gsecongeo.89.8.1842
UR  - https://pubs.usgs.gov/publication/70017420
ID  - 70017420
ER  -