"Do You Know" Letters (Pamphlet)
name: label: Collection Collector
content: National Museum of American History (U.S.). Division of Work and Industry
setName: label: See more items in
content: Railroad Trade Literature Collection
label: See more items in
content: Railroad Trade Literature Collection / Series 1: Trade Literature / 1.226: Westinghouse Air Brake Company
unitdate: label: Date
content: 1937-1940
container: label: Container
content: Box 71, Folder 25
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials