A diverse set of historical maps, reports, letters, and photos on mining in Arizona from the AZGS archives is now available online in the new "Arizona Mines" section of the Arizona Memory Project. [right, Morenci Mine, ca 1930]
"The Arizona Memory Project is an online effort to provide access to the wealth of primary sources in Arizona libraries, archives, museums and other cultural institutions. This initiative provides the opportunity to view some of the best examples of government documents, photographs, maps, and objects that chronicle Arizona's past and present." [from their website]