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_a551.9 _bU61 |
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| 245 | 0 | _aPROCEEDINGS OF THE SECOND SEMINAR ON GEOCHEMICAL PROSPECTING METHODS AND TECNIQUES | |
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| 260 |
_aU.S.A. _bUNITED NATIONS _c1970 |
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| 300 |
_a413 pag _c28 cm |
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| 490 |
_v0 _a0 |
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| 541 | _d02-Feb-01 | ||
| 650 | _aCIENCIAS PURAS | ||
| 856 | _zCC. Puras | ||
| 942 | _cLIBRO | ||
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_c16828 _d16828 |
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