Product Files--BK-501 "Mail-A-Voice," undated (includes Mail-A-Voice disk and photographs)
name: label: Collection Creator
content: Begun, S. Joseph (Semi Joseph), 1905-1995
setName: label: See more items in
content: S. Joseph Begun Papers
label: See more items in
content: S. Joseph Begun Papers / Series 2: Professional Files / 2.3: Brush Development Company
unitdate: label: Date
content: 1947 - 1950
container: label: Container
content: Box 6, Folder 8-11
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials