Volume I and Volume II, Proceedings of the Symposium and Specialty Conference presented by the Western Division of the American Fisheries Society and the Power Division of the American Society of Civil Engineers, Volume I has 550 pages, Volume II has 658 pages, both volumes have former owner's name on title page, both copies have light soiling to covers and edgewear to covers, when books are closed, some soiling from shelfwear evident to page edges, contents clean and unmarked, scholarly material,