TY - RPRT TI - Investigations of fluvial sediments of the Niobrara River near Valentine, Nebraska AU - Bruce R. Colby AU - D.Q. Matejka AU - David Wellington Hubbell PY - 1953 DO - 10.3133/cir205 UR - https://pubs.usgs.gov/publication/cir205 ID - cir205 ER -