Technical papers. 48-52. Surface currents as determined by drift card releases on Continental Shelf off northwestern United States; Age, growth, sex composition, and maturity of white bass in Bull Shoals Reservoir; Food habits of 5 centrachids during filling of Beaver Reservoir, 1965-66; Identification of ingested gizzard shad and threadfin shad by gizzard dimensions [with lists of references]; by Sven I. Johnson [and others].