000 003010000a22001450004500
050 _a010
060 _a100
082 _a631.45 GUS
100 _aGustafson, AF
_fgeneral
245 _aConservation of the soil
260 _aDelhi, Biotech Books
260 _c2011
300 _a312
942 _cBK
999 _c225420
_d225420