References: Ralph Bagnold

Bagnold, R. A. “The Movement of a Cohesionless Granular Bed by Fluid Flow over It.” British Journal of Applied Physics 2, no. 2 (1951): 29.
Bagnold, Ralph Alger. The Physics of Blown Sand and Desert Dunes. London ; New York : Methuen & Co. : William Morrow, 1941.
Bagnold, R. A. “The Movement of Desert Sand.” The Geographical Journal 85, no. 4 (1935): 342.
Bagnold, R. A., and O. Barndorff-Nielsen. “The Pattern of Natural Size Distributions.” Sedimentology 27, no. 2 (1980): 199–207.
Leopold, Luna B., R. A. Bagnold, M. Gordon Wolman, and Lucien M. Brush. “Flow Resistance in Sinuous Or Irregular Channels,” 1960.