TY  - RPRT
TI  - Environmental geochemistry
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1969
DO  - 10.3133/ofr72398_72403
UR  - https://pubs.usgs.gov/publication/ofr72398_72403
ID  - ofr72398_72403
ER  -