Navigation lock gates and valves /
by George C. Richardson.
APA Citation
Richardson, G. C., United States. Army. Corps of Engineers. Walla Walla District. (1963). Navigation lock gates and valves. Walla Walla (Wash.): U.S. Army Corps of Engineers.
MLA Citation
Richardson, George C., F.R.C.O, and United States. Army. Corps of Engineers. Walla Walla District. Navigation Lock Gates And Valves. Walla Walla (Wash.): U.S. Army Corps of Engineers, 1963.
Warning: These citations may not always be complete (especially for serials).