Audio Frequency Instruments
name: label: Collection Creator
content: Clark, George Howard, 1881-1956
setName: label: See more items in
content: George H. Clark Radioana Collection
unitdate: label: Date
content: 1906-1939
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
identifier: label: Identifier
content: NMAH.AC.0055, Series 150
objectType: label: Type
content: Archival materials
scopecontent: label: Scope and Contents note
content: Series 150 contains a bibliography on the measurement of signal intensity; booklets; charts; correspondence, 1906, 1913, 1914, 1918, 1919; graphs; instrucitons; notes; periodical clippings; photographs and reports.