1. Bascom W.N. (1951) from King C.A.M. Beaches and Coasts published by Edward Arnold Ltd. London 1972.
2. Clark G. Personal Communication January 1986.
3. Curren C.R. and Chatham C.E. Jr. "Imperial Beach California Design of Structures for Beach Erosion Control" TR H-77-15 U.S. Army Engineer Waterways Experiment Station Vicksburg Mississippi August 1977.
4. Curren C.R. and Chatham C.E. Jr. "Oceanside Harbour and Beach California Design of Structures for Harbour Improvement and Beach Erosion Control" TR HL-80-10 U.S. Army Engineer Waterways Experiment Station Vicksburg Mississippi June 1980.