In the tunnel of a coal mine, Pittsburgh, Pennsylvania
name: label: Collection Creator
content: Vogel, Robert M.
setName: label: See more items in
content: Mechanical and Civil Engineering Stereograph Cards
label: See more items in
content: Mechanical and Civil Engineering Stereograph Cards / Series 1: Stereograph Cards / 1.19: Coal and Coke Production
unitdate: label: Date
content: 1907
container: label: Container
content: Box 3
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials
label: Type
content: Photographs