000 00311nam a2200133Ia 4500
008 230108s9999 xx 000 0 und d
100 _aAcademia Sinica
245 0 _aProceedings of Symposium on Paddy Soil
260 _bBeijing
260 _c1981
365 _b0.00
650 _aSoil science
942 _cBK
999 _c249498
_d249498