000			003190000a22001450004500
060			_a100
082			_a631.47 GUS
100			_aGustafson, A F
245			_aUsing and managing soils
260			_aU S A, Mc Graw- Hill Book Company Inc
260			_c1948
300			_a420
650			_aSoil biology
942			_cBK
999			_c221348 _d221348