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  - R. B. Alexander
AU  - R. A. Smith
AU  - M. J. Focazio
AU  - M.A. Horn
PY  - 1999
DO  - 10.3133/fs16099
UR  - https://pubs.usgs.gov/publication/fs16099
ID  - fs16099
ER  -