Ophir Mine in the Sugar Loaf Mining District of Boulder County, Colorado. 1915.
Related Entities
There are 4 Entities related to this resource.
Coan, Abraham S., 1862-1940.
http://n2t.net/ark:/99166/w6tv4bcg (person)
O'Brien, Alison, 1952-
http://n2t.net/ark:/99166/w6gb3qt6 (person)
Ingold, John, active 1895-1900
http://n2t.net/ark:/99166/w6xm02f2 (person)
Walberg, Frank.
http://n2t.net/ark:/99166/w6xm02ww (person)