000 00319nam a2200121Ia 4500
008 170101s1971 xx 000 0 und d
082 _a631.58 RUT
100 _aRuthenberg Hans
245 0 _aFarming Systems in the Tropics
260 _aLondon
_bClarertdonOxford Univ. Press
_c1971
300 _a313 p.
942 _2ddc
_cB
999 _c37016
_d37016