GEOLOGY OF THE PRIETA MINE, PARRAL, CHIHUAHUA.PICKARD GW.1970; AM. INST. MIN. METALL. ENG., WORLD SYMPOSIUM LEAD-ZINC; USA; 1970, VOL. 1, P. 123 A 129Miscellaneous

GEOLOGY OF THE PRIETA MINE, PARRAL, CHIHUAHUA.PICKARD GW.1970; IN: A.I.M.E. WORLD SYMP. MIN. METALL. LEAD ZINC. SAINT-LOUIS, MO., 1970. I.; 1970, P. 123 A 129Miscellaneous

GEOCHEMICAL ORE GUIDES AT CHARCAS UNIT,SAN LUIS POTOSI,MEXICO.(ABSTRACT).GOMEZ M; PICKARD GW; COOLBAUGH DF et al.1968; GEOL. SOC. AMER., ABSTR. PROGRAMS; USA; 1968(11)Miscellaneous