"How to Test Your Copy with a Hidden Offer", undated
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 2: Publications / 2.1: Articles
container: label: Container
content: Box 21, Folder 46
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials