Glass Plate Negatives
name: label: Collection Creator
content: Cummings, Robert A., 1866-1962
setName: label: See more items in
content: Cummings Structural Concrete Company Records
unitdate: label: Date
content: 1889-1918 and undated
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
identifier: label: Identifier
content: NMAH.AC.0218, Series 7
objectType: label: Type
content: Archival materials