Longshore-bars and longshore-troughs.
APA Citation
United States. Beach Erosion Board. (1950). Longshore-bars and longshore-troughs. [Washington]: U.S. Beach Erosion Board.
MLA Citation
United States. Beach Erosion Board. Longshore-bars And Longshore-troughs. [Washington]: U.S. Beach Erosion Board, 1950.
Warning: These citations may not always be complete (especially for serials).