00301nam a2200121 a 450000500170000002000150001708200170003210000160004924500490006525000160011426000280013030000210015820251203110653.0  a8177542346  a631.584bGUP  aGupta, P.K.  aVermicompostingbFor Sustainable Agriculture  a2nd Rev.ed.  aJodhpurbAgrobiosc2003  a210p.c24 cm. HB