American Telephone and Telegraph Company, telephones, emergency call system
name: label: Collection Creator
content: Ayer (N W) Incorporated.
setName: label: See more items in
content: N W Ayer Advertising Agency Records
label: See more items in
content: N W Ayer Advertising Agency Records / Series 4: 2001 Addendum
unitdate: label: Date
content: 1985
container: label: Container
content: Box 29 (Series 4), Folder 7
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials