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geología (2) |
minería (2) |
oro (2) |
perforación (2) |
plata (2) |
550.8 : 622.1 (825.3) + (826.7) (047) (1) |
553.41 : 553.43 (828.8) (047) (1) |
Brava, mina (La Rioja, Argentina) (1) |
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