TY  - RPRT
TI  - Sulphur and pyrite
AU  - Frank L. Hess
AU  - Donnel Foster Hewett
AU  - Esper Signius Larsen
AU  - J. F. Hunter
PY  - 1913
DO  - 10.3133/b530h
UR  - https://pubs.usgs.gov/publication/b530H
ID  - b530H
ER  -