MJ engineering and mining journal PDF Free Download
data at a Mex mine Exports of minerals Foreigner in Mexico Gold Instituto de Minas y Met 1 States lata »66o pumping plant 411 452 1261 70 1071 750 891 Cost hie 1251 777 Mex Copper 14 1 of Sonora mining investments dist Candelaria Coai 287 750 »806 iction Mexico 157 465 s 403 601 994 Devel among 1115 1220 Mineral land