Berg, D. W., & Watts, G. M. (1967). Variations in groin design. U.S. Army Engineer Coastal Engineering Research Center, Dept. of the Army, Corps of Engineers.
Citace podle Chicago (17th ed.)Berg, Dennis W., a George M. Watts. Variations in Groin Design. [Washington, D.C.]: U.S. Army Engineer Coastal Engineering Research Center, Dept. of the Army, Corps of Engineers, 1967.
Citace podle MLA (8th ed.)Berg, Dennis W., a George M. Watts. Variations in Groin Design. U.S. Army Engineer Coastal Engineering Research Center, Dept. of the Army, Corps of Engineers, 1967.
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