Baltiore and ohio Railroad Bridge, Pratt truss, Susquehanna River, Havre de Grace, Maryland
name: label: Collection Creator
content: Plowden, David
setName: label: See more items in
content: David Plowden Steel Manufacturing Photographs
unitdate: label: Date
content: undated
container: label: Container
content: Box 1, Folder 8
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials
label: Type
content: Photographs