TY  - RPRT
TI  - Annotated bibliography and index map of sulfur and pyrites deposits in the United States and Alaska (including references to July 1, 1951)
AU  - Gilbert H. Espenshade
AU  - Carl H. Broedel
PY  - 1952
DO  - 10.3133/cir157
UR  - https://pubs.usgs.gov/publication/cir157
ID  - cir157
ER  -