NEW MEXICO STATE BUREAU OF MINES AND MINERAL RESOURCES Don H. Baker, Jr., Director Frank E. Kottlowski...LYNN A. BRANDVOLD, Chemist W I L L I A M L . H A W K S , M a t e ri a l s E n g i n e e r ROBERT W. KELLEY...Geologist Plus more than z8 undergraduate assistants New Mexico Tech Staff Advisors GALE BILLINGS, Geoscience...Geoscience PAIGE W. CHRISTIANSEN, Historian-Mining ALLAN R. SANFORD, Geophysics F RA N K B. TITU S , Hydrology...Ore Deposits of Sierra County, New Mexico by GEORGE TOWNSEND HARLEY 1934 New Mexico State Bureau of |