Pile trestles as channel obstructions
Yarnell, D.L.
Pile trestles as channel obstructions - Washington 1934 - 1-26 p. - United States Department of Agriculture. Technical Bulletin No. 429 .
Pile trestles as channel obstructions - Washington 1934 - 1-26 p. - United States Department of Agriculture. Technical Bulletin No. 429 .