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_aGliessman, Stephen R. _948282 |
| 245 | _aAncient raised-field agriculture in the maya lowlands of southeastern Mexico | ||
| 500 | _aSobretiro de : Conference prehistoric intensive agriculture in he tropics (1981: Canberra, Australia) 24 h. | ||
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| 650 | 1 | 4 |
_aAgricultura _xHistoria _xQuintana Roo. _91528 |
| 650 | 1 | 4 |
_aMayas _xAgricultura. _973210 |
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