000 00324nam a2200121Ia 4500
008 151015s9999 xx 000 0 und d
020 _a9251037760
100 _aand sustainability implication
245 _aTillage system in the tropic
_bManagement option an
260 _c1995
300 _axviii 205p.
942 _cFAO
_2udc
999 _c24891
_d24891