TY  - RPRT
TI  - Contributions to economic geology, 1912; Part I, Metals and nonmetals except fuels--Sulphur and Pyrite
AU  - Donnel Foster Hewett
PY  - 1914
DO  - 10.3133/b540r
UR  - https://pubs.usgs.gov/publication/b540R
ID  - b540R
ER  -