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Mining lease and option on property of Frank Heizelman : Crescent lode, Grand Union lode and St. Marys lode all being survey no. 5327 in the Central Mining District in the county of Boulder and the state of Colorado
Contributor:Heizelman, Frank; Smith, A. B.; Alberts, George B., Jr.; Reinhart, Francis
Report on the Finch group of mines situated in Magnolia Mining District, Boulder County, Colorado
Contributor:Rule, William M.; Finch, E. M.; Finch, D. L.
Statement concerning the Bluestone lode claims nos. 1, 2 & 3 : Boulder County
Contributor:Holmes, W. I.