Competitors
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 4: Product Literature
unitdate: label: Date
content: 1974 and undated
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
identifier: label: Identifier
content: NMAH.AC.1249, Subseries 4.2
objectType: label: Type
content: Archival materials