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100   $a20130404d1955----km-y0itay50------ba
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200 1 $aClassification of rocks$fby Russell B. Travis
210   $aGolden$cColorado school of mines$d1955
215   $a98 p., [3] c. di tav.$cill.$d23 cm
610 0 $aGeologia applicata
700  1$aTravis,$bRussell B.$0519605
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