TY  - RPRT
TI  - Procedures for determining drainage areas using a digitizer, digital computer, and topographic maps
AU  - R.L. Gold
AU  - Dan Winkless
PY  - 1988
DO  - 10.3133/wri864083
UR  - https://pubs.usgs.gov/publication/wri864083
ID  - wri864083
ER  -