000 00277nam a2200121Ia 4500
008 180721s9999 xx 000 0 und d
100 _aAlfred E.Hartemink
245 0 _aSoil fertility decline in the tropics
260 _bNil
260 _c0
365 _b0.00
942 _cBK
999 _c128279
_d128279