000 00302nam a2200133Ia 4500
008 230108s9999 xx 000 0 und d
100 _aUpton M
245 0 _aEconomics of Tropical Farming Systems
260 _bCambridge
260 _c1998
365 _b250.00
650 _aAgronomy
942 _cBK
999 _c247697
_d247697