@misc{indiciae1b28f81a300b, title = {Preliminary estimate of the underflow across the South Dakota-Nebraska State line in the Niobrara River and Ponca Creek drainage basins}, author = {E.C. Reed and Charles Franklin Keech}, year = {1957}, doi = {10.3133/ofr5794}, url = {https://pubs.usgs.gov/publication/ofr5794}, note = {Source identifier: ofr5794} }