General promotion letters (advertising for whooping cough, diphtheria, and bacterial vaccines)
name: label: Collection Author
content: Parke, Davis Company
setName: label: See more items in
content: Parke, Davis Research Laboratory Records.
label: See more items in
content: Parke, Davis Research Laboratory Records. / Series 4: Advertising/Sales Materials / 4.1: Advertisements
unitdate: label: Date
content: 1915
container: label: Container
content: Box 264, Folder 15A
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials