TY  - RPRT
TI  - Streamflow conditions for the conterminous United States and southern Canada annual maps (water years 1921-90) and monthly maps (water years 1945-90)
AU  - Krishnaveni V. Sarma
PY  - 1991
DO  - 10.3133/ofr90160
UR  - https://pubs.usgs.gov/publication/ofr90160
ID  - ofr90160
ER  -