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).