TY  - RPRT
TI  - Contributions to economic geology, 1906, Part I, Metals and nonmetals except fuels--Introduction; gold and silver
AU  - C. W. Hayes
AU  - William Harvey Emmons
AU  - Edwin Clarence Eckel
AU  - Lester H. Woolsey
AU  - Arthur James Collier
AU  - Alfred Reginald Schultz
PY  - 1907
DO  - 10.3133/b315a
UR  - https://pubs.usgs.gov/publication/b315A
ID  - b315A
ER  -