Correspondence
name: label: Collection Inventor
content: Del Mar, Bruce E., 1913-
setName: label: See more items in
content: Del Mar Avionics Holter Monitor Records
label: See more items in
content: Del Mar Avionics Holter Monitor Records / Series 6: Holter Monitor / 6.1: Background Materials
unitdate: label: Date
content: 1958
container: label: Container
content: Box 3, Folder 26
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials