Signals - Interlocking
name: label: Collection Collector
content: Watkins, J. Elfreth (John Elfreth), 1852-1903
label: Collection Creator
content: White, John H., 1933-
setName: label: See more items in
content: Division of Transportation Railroad Reference Files
label: See more items in
content: Division of Transportation Railroad Reference Files / Series 4: Railroad Companies and Lines
container: label: Container
content: Box 81, Folder 2
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials