Author
Philadelphia (Pa.). Department of Wharves, Docks and Ferries
3
U.S Board of Engineers for Rivers and Harbors
2
Franklin Institute (Philadelphia, Pa.)
1
Haupt, Lewis Muhlenberg, 1844-1937
1
Martin, Alfred Simpson
1
Reath, Henry T.
1
Trigg, Ernest T., 1877-1957
1
U.S Maritime Commission
1
U.S Shipping Board
1
Weglein, Richard
1