Disambiguation evidence for Keweenaw copper mining district via surface form
"Calumet & Hecla mining district"
Triples (1)
Triples where some other subject referred to this entity
as "Calumet & Hecla mining district".
Copper Country Strike of 1913–1914
→
locatedIn
→
"Calumet & Hecla mining district"
ⓘ
↳ resolves to Keweenaw copper mining district