D. M. Davidson, Jr., Business Manager, El Paso, Texas Printed by Lancaster Press, Inc., Lancaster, Pennsylvania...Copper, Lead, and Zinc. . Lewis B. Gustafson and Neil Williams 139 An Overview of Sandstone Lead Deposits...Relationship to Red-Bed Copper and CarbonateHosted Lead-Zinc Deposits.A. Bjfirlykke and D. F. Sangster ...and Sherman P. Marsh 775 Electrical Methods in Mining Geophysics.Gerald W. Hohmann and Stanley H. Ward...making a profit. Initially incorporated in the District of Columbia, the Publishing Company was reincorporated |