000 00293nam a2200109Ia 4500
008 140205s9999 xx 000 0 und d
100 _aKampen, J
245 3 _aAn approach to improved productivity on deep vertisols
260 _bICRISAT
_aHyderabad, A.P.
_c1982
300 _a14
942 _2ddc
_cTR
999 _c5063
_d5063