TY  - RPRT
TI  - Contributions to economic geology, 1906, Part I, Metals and nonmetals except fuels--Phosphates and Phosphorus
AU  - Fred Boughton Weeks
AU  - W.F. Ferrier
AU  - Albert Homer Purdue
AU  - George W. Stose
PY  - 1907
DO  - 10.3133/b315p
UR  - https://pubs.usgs.gov/publication/b315P
ID  - b315P
ER  -