http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
containing a description of the mines and mills, and the mining and milling corporations of Colorado, arranged alphabetically by counties, and A history of Colorado from its early settlement to the present time
At head of title: Colorado mining directory. Compiled by T. Corbett.
Microfiche. Ann Arbor, Mich., Xerox University Microfilms 1975. 5 sheets. 10.5 x 14.8 cm.