Sayre, William. W. 1927-1981 Transport and dispersion of labeled bed material north loup river, Nebraska / by W. W. Sayre and D. W. Hubbell. -- Washington : United States Government Printing Office, 1965 - 48 p. -- (Geological Survey Professional Paper ; 433-C). Subjects--Topical Terms: RadiactividadRadionúclidosSedimentación Universal Decimal Class. No.: 539.163 ; 551.3.051