Encyclopaedia Britannica Company Ltd., encyclopedias
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 3: Proof Sheets
unitdate: label: Date
content: undated
container: label: Container
content: Box 517 (Series 3)
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials