Copy testing lantern slides
name: label: Collection Creator
content: Caples, John, 1900-1990 (advertising executive)
label: Collection Creator
content: Caples, Dorothy
setName: label: See more items in
content: John Caples Papers
label: See more items in
content: John Caples Papers / Series 4: Client Files / 4.3: Copy testing results
container: label: Container
content: Box 56
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials