Verlag: University of Arizona, Tuscon, Arizona, 1983
Zustand: very good. Mineral districts presented herein and delineated on the enclosed map were defined according to geological criteria. The principal goal was to arrange known metallic mineral occurrences into discreet metallogenic systems of similar age and style of mineralization. DM2. softcover, 8.5" x 11", foldout inside rear cover, 58 pages, initials written on cover.