Leffel's Cascade Wheel at the University of Michigan (thesis by Chas. G. Simonds)
name: label: Collection Creator
content: James Leffel and Company
setName: label: See more items in
content: James Leffel and Company Records
label: See more items in
content: James Leffel and Company Records / Series 3: Testing Data
unitdate: label: Date
content: 1897
container: label: Container
content: Box 13, Folder 6
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials