| | Report (issue) | the cover—Turquois crystals from Lynch Station, Virginia; x ca.; pho tograph by Neal Ycdlin; color plates...C. A. Michael. COLD NUGGET FROM SPOTSYLVANIA COUNTY: Longest dimension approximately 13 cm., photograph...of Virginia R. V. DIETRICH* Professor of Geology and Associate Dean of Arts & Sciences, Virginia Polytechnic...Polytechnic Institute Research Division Bulletin 47 Virginia Polytechnic Institute, Blacksburg, Va. 24061 *... © R. V. Dietrich and the Research Division of Virginia Polytechnic Institute, 1970 Printed and bound | | Bramel, Hadley R., Heyl, George R., Cox, Manning W., Ransome, Alfred L., Eric, John H., Wyant, Donald G. (1948) Copper in California. Bulletin 144. California State Mining Bureau | Report (issue) | Butte County, California, bv John H. Eric Geology of the Lilvama and Pioneer Mines, El Dorado County, and...---"--7-1, George R. Heyl by George California, County, Newton Copper Mine, Amador R. Heyl and John H...H. Eric ""~V" Pemi Zinc-Copper Mine, Calaveras County, California, by George R. Hevl, Manning W. Cox,...Gravhouse Area, Amador County, California, by George T"" R. Heyl -;;— Calitornia, County, Calaveras Copperopolis... Calaveras County, California, by George R. Heyl La Victoria Copper Mine, Mariposa County, California |
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