Ismail, Sultan A.. Vermicology : the biology of earth worms / Sultan A. Ismail. - Chennai : Orient Longman , 1997. - vi ,92p. : ill.,col.figs,tables ; 23cm . NULL ISBN: 8125010106 Rs. 75.00 Subjects--Index Terms: EARTH WORMS Dewey Class. No.: 592.64 / ISM/V