Author
École nationale des ponts et chaussées (France)
3
Baron, H.
2
Condit, Carl W.
2
Stevenson, David, 1815-1886
2
American Canal and Transportation Center
1
American Society of Civil Engineers. Philadelphia Section
1
Ecole nationale des ponts et chaussées (France)
1
Latrobe, Benjamin Henry, 1764-1820
1
Maryland Historical Society
1
Permanent International Association of Navigation Congresses American representatives
1
Philadelphia Record
1
Sganzin, J.
1
Sganzin, J. M. 1750-1837
1
Shank, William H.
1
Stapleton, Darwin H.
1
Trautwine, John C. 1810-1883
1