000 00273nam a2200097Ia 4500
008 120224s9999 xx 000 0 und d
082 _a630.913
_bRUT
100 _aRuthenberg, Hans
245 _aFarming systems in the tropics
260 _bClarendon Press
_aOxford
_c1983
999 _c131964
_d131964