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100 0 _aSINGH Lal.
245 1 0 _aPractical agricultural chemistry and soil science.
260 _aIndia :
_bBishen,
_c1987.
300 _a301 p. ;
_c23 cm.
650 0 _aAgricultural Chemistry.
908 _a070719
999 _c5753
_d5753