TY  - RPRT
TI  - Preliminary Metallogenic Map of North America: A listing of deposits by commodity
AU  - Michael P. Lee
AU  - Philip White Guild
AU  - Paul G. Schruben
PY  - 1987
DO  - 10.3133/cir858c
UR  - https://pubs.usgs.gov/publication/cir858C
ID  - cir858C
ER  -