TY  - RPRT
TI  - Aeromagnetic and tectonic analysis of the Upper Mississippi Valley zinc-lead district
AU  - Allen Van Heyl
AU  - Elizabeth R. King
PY  - 1966
DO  - 10.3133/b1242a
UR  - https://pubs.usgs.gov/publication/b1242A
ID  - b1242A
ER  -