Doors directing ventilation in a coal pit
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 / 1.45: Foreign - Coal Mining
unitdate: label: Date
content: undated
container: label: Container
content: Box 6
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials
label: Type
content: Photographs