TY  - RPRT
TI  - Minor epigenetic, diagenetic, and syngenetic sulfide, fluorite, and barite occurrences in the central United States
AU  - A. V. Heyl
PY  - 1968
DO  - 10.2113/gsecongeo.63.6.585
UR  - https://pubs.usgs.gov/publication/70221366
ID  - 70221366
ER  -