National Bureau of Standards, Boulder, Colorado, ammonia clock
name: label: Collection Creator
content: Forman, Paul
setName: label: See more items in
content: Atomic Clocks Reference Collection
label: See more items in
content: Atomic Clocks Reference Collection / Series 1: Subject Files
unitdate: label: Date
content: undated
container: label: Container
content: Box 7, Folder 18
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials