000 00310nam a2200133Ia 4500
008 230108s9999 xx 000 0 und d
100 _aSingh AK
245 0 _aSoil Sustainability For Crop Productivity
260 _bAgrotech
260 _c2011
365 _b600.00
650 _aSoil science
942 _cBK
999 _c250949
_d250949