International Brotherhood of Boiler Makers, Iron Ship Builders, and Helpers of America. Local 187 (Pinto Valley, Ariz.)

This collection contains personal papers, minutes, agendas, membership lists, correspondence, conference materials, newspaper and journal articles, newsletters, interviews, and video and audio tapes documenting Don Shelton's work at Magma Copper Company between 1965 and 1998. Of particular interest are the materials documenting changes in the company and local unions at both of Magma's branches (San Manuel and Pinto Valley).