TY  - RPRT
TI  - Source-area characteristics of large public surface-water supplies in the conterminous United States : an information resource for source-water assessment
AU  - Richard B. Alexander
AU  - Richard A. Smith
AU  - Michael J. Focazio
AU  - Marilee A. Horn
PY  - 1999
DO  - 10.3133/ofr99248
UR  - https://pubs.usgs.gov/publication/ofr99248
ID  - ofr99248
ER  -