TY  - RPRT
TI  - Hydrologic unit maps
AU  - Paul R. Seaber
AU  - F. Paul Kapinos
AU  - George L. Knapp
PY  - 1987
DO  - 10.3133/wsp2294
UR  - https://pubs.usgs.gov/publication/wsp2294
ID  - wsp2294
ER  -