Hoyt, Charles Hamilton, Burr, William H. (William Hubert), 1851-1934, United States. Bureau of Public Roads · Washington : U.S. Dept. of Agriculture, Office of Public Roads : G.P.O. · leaf 36
Fig. 1 .—Destruction of a Culvert Constructed Without Wing Walls. … Fig. 2.—Culvert with Substantial Abutments and Wing Walls. !ul. 43, Office of Public Roads, U. S. Dept. of Agriculture. Plate XI.
Bridges Design and construction · Culverts
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