W. Gregory, Means for Operating Gang Plows (US 819,423)
name: label: Collection Creator
content: Secor, John Alstyne, 1847-1935
setName: label: See more items in
content: John A. Secor Collection
unitdate: label: Date
content: 1906
container: label: Container
content: Box 1, Folder 8
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials