Magnetic modulators
name: label: Collection Creator
content: Clark, George Howard, 1881-1956
setName: label: See more items in
content: George H. Clark Radioana Collection
label: See more items in
content: George H. Clark Radioana Collection / Series A: Thomas Coke KnightT RCA Photographs, circa 1902-1950 / 1.3: Broadcasting
container: label: Container
content: Box 410, Folder 6
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials
scopecontent: label: Scope and Contents note
content: Green numbers on photoprints: 979-981