Materials are arranged alphabetically.
Box 70 "Bridge Specification, Material Requirements." U.S. Department of Agriculture, Bureau of Public Roads, Division of Bridges, Washington, D.C., 1939 Feb, 1 item
Box 70 Morgan, N.W. "Specifications for Highway Bridges." [1 of 3.], 1938 Apr, 1 item
U.S. Department of Agriculture, Bureau of Public Roads, Division of Bridges, Washington, D.C.
Box 70 Morgan, N.W. "Specifications for Highway Bridges." [2 of 3.], 1938 Apr, 1 item
U.S. Department of Agriculture, Bureau of Public Roads, Division of Bridges, Washington, D.C.
Box 70 Morgan, N.W. "Specifications for Highway Bridges." [3 of 3.], 1938 Apr, 1 item
U.S. Department of Agriculture, Bureau of Public Roads, Division of Bridges, Washington, D.C.
Box 70 "New Means and Methods Noted in Studies of Road Construction Work," United States Department of Agriculture, Bureau of Public Roads. [1 of 2.], 1922, 1 item
Report includes photographs.
Box 70 "New Means and Methods Noted in Studies of Road Construction Work," United States Department of Agriculture, Bureau of Public Roads. [2 of 2.], 1922, 1 item
Report includes photographs.
Box 70 "United States Department of Agriculture, Bureau of Public Roads, Division of Management.", 1928 Jul 01, 1 item
Report includes photographs.