Balling testing machine
name: label: Collection Creator
content: Bethlehem Steel Corporation
setName: label: See more items in
content: Bethlehem Steel Corporation Mining Photographs
label: See more items in
content: Bethlehem Steel Corporation Mining Photographs / Series 4: Black-and-White Negatives / 4.6: Topical
unitdate: label: Date
content: 1955 August 3
container: label: Container
content: Box 40
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials