TY - RPRT TI - Digital-map grids of mean-annual precipitation for 1961-90, and generalized skew coefficients of annual maximum streamflow for Oklahoma AU - A. H. Rea AU - R. L. Tortorelli PY - 1997 DO - 10.3133/ofr97574 UR - https://pubs.usgs.gov/publication/ofr97574 ID - ofr97574 ER -