TY  - RPRT
TI  - Isotopic study of galenas from the upper Mississippi Valley, the Illinois-Kentucky, and some Appalachian Valley mineral districts
AU  - A. V. Heyl
AU  - M.H. Delevaux
AU  - R. E. Zartman
AU  - M. R. Brock
PY  - 1966
DO  - 10.2113/gsecongeo.61.5.933
UR  - https://pubs.usgs.gov/publication/70221230
ID  - 70221230
ER  -