Keystone Bridge Company, Pittsburgh, Pennsylvania
name: label: Collection Creator
content: Vogel, Robert M.
label: Collection Creator
content: Shayt, David H.
label: Collection Creator
content: Worthington, Bill
setName: label: See more items in
content: Division of Mechanical and Civil Engineering Bridges Reference Collection
label: See more items in
content: Division of Mechanical and Civil Engineering Bridges Reference Collection / Series 1: Bridges
unitdate: label: Date
content: 1870s
container: label: Container
content: Box 43, Folder 1
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials