1. The Heintzelman Mine, at Cerro Colorado, Near Tubac, Arizona. Call Number: Zc56 859sp Collection Title: Report of Frederick Brunckow to a committee of the stockholders of the Sonora Exploring & Mining Co Image Count: 1 Resource Type: Books, Journals & Pamphlets Found in: Beinecke Rare Book and Manuscript Library > The Heintzelman Mine, at Cerro Colorado, Near Tubac, Arizona.