TY - RPRT TI - Anthropogenic and natural lead isotopes in Fe-hydroxides and Fe-sulphates in a watershed associated with arsenic-enriched groundwater, Maine, USA AU - Robert A. Ayuso AU - Nora K. Foley PY - 2022 DO - 10.1144/1467-7873/07-153 UR - https://pubs.usgs.gov/publication/70033450 ID - 70033450 ER -