Duplex and Quadraplex Telegraphy
name: label: Collection Creator
content: United Telegraph Workers.
label: Collection Creator
content: Western Union Telegraph Company
setName: label: See more items in
content: Western Union Telegraph Company Records
label: See more items in
content: Western Union Telegraph Company Records / Series 18: Employee/Personnel Records / 18.8: American School of Correspondence
unitdate: label: Date
content: 1917
container: label: Container
content: Box 600, Folder 11
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials