Engineering Materials
name: label: Collection Creator
content: Calumet and Hecla Mining Company.
label: Collection Creator
content: Leavitt, Erasmus D., 1836-1916
setName: label: See more items in
content: Erasmus D. Leavitt Papers
unitdate: label: Date
content: 1861-1955
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
identifier: label: Identifier
content: NMAH.AC.0966, Series 1
objectType: label: Type
content: Archival materials