TY  - RPRT
TI  - Preliminary map of the conterminous United States showing depth to and quality of shallowest ground water containing more than 1,000 parts per million dissolved solids
AU  - John Henry Frederick Feth
PY  - 1965
DO  - 10.3133/ha199
UR  - https://pubs.usgs.gov/publication/ha199
ID  - ha199
ER  -