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 2: Del Mar Avionics Engineering
unitdate: label: Date
content: 1965-1976
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
identifier: label: Identifier
content: NMAH.AC.1249, Subseries 2.1
objectType: label: Type
content: Archival materials