TY  - RPRT
TI  - Lead in the United States
AU  - Edwin Thor McKnight
AU  - W.L. Newman
AU  - Allen Van Heyl
PY  - 1961
DO  - 10.3133/ofr6194
UR  - https://pubs.usgs.gov/publication/ofr6194
ID  - ofr6194
ER  -