Geophysical Case History of North Silver Bell, Arizona: a Supergene-Enriched Porphyry Copper Deposit
Publisher – Zonge, 1996. Authors – Mark W. Thoman, Regional Geologist, Minera Phelps Dodge Mexico, Tucson, Arizona Kenneth L. Zonge, President, Zonge Engineering and Research Organization, Tucson, Arizona Dexin Liu, Geophysicist, Zonge Engineering and Research Organization, Tucson, Arizona Paper – [pdf] Silver Bell Case History Introduction and Summary