TY  - RPRT
TI  - Lead isotopes from the Upper Mississippi Valley district: A regional perspective
AU  - Timothy M. Millen
AU  - Robert E. Zartman
AU  - Allen Van Heyl
PY  - 1995
DO  - 10.3133/b2094b
UR  - https://pubs.usgs.gov/publication/b2094B
ID  - b2094B
ER  -