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904 _aBCO
905 _aC
908 _aJ
909 _aAS
914 _aSILVI
914 _aRIBRE
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100 1 _9128462
_aVERGARA, N.T.
260 _c1976
650 1 4 _9134805
_aAGRICULTURA MIGRATORIA
650 1 0 _aECONOMIA
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650 1 4 _9167494
_aTROPICO HUMEDO
691 _9145178
_aECONOMICS
692 _aECONOMIE
773 0 _tThe Philippine Lumberman
_d1976
_gp.25-30
040 _aCR-TuBCO
_cCR-TuBCO
_bEs
245 1 0 _aShifting agriculture in the humid tropics: analysis and control
942 _cANA
003 CR-TuBCO
999 _c50096
_d50096