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| 020 | _a0063854910 | ||
| 037 | _cGeneral Book | ||
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_aRTL _cRTL _beng |
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| 041 |
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| 082 | _aU16:(G:5), L2 | ||
| 110 |
_aNational Academy of Sciences Naitonal Research Council (USA) _9317741 |
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| 245 | 0 | _aEarth and human affairs | |
| 260 |
_aNew York _bHarper & Row USA _c1972 |
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| 300 |
_axii, 139p. Bib p. 133-34 _ccm. |
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| 650 | _aGeography | ||
| 700 |
_aNational Academy of Sciences Naitonal Research Council (USA) _9317742 |
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| 942 |
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