000 00271nam a2200097Ia 4500
008 230915s9999 xx 000 0 und d
050 _aS 439 .G 75 1974
100 _aGRIGG, D. B.
245 4 _aTHE AGRICULTURAL SYSTEMS OF THE WORLD, AN EVOLUTIONARY APPROACH
942 _cBK
999 _c201416
_d201416