00444nam a22001817a 450000500170000001000140001702000250003103500130005603700130006908200080008210000200009024500480011026000370015827000390019530000220023470000030025670000030025920100811161539.0  aENG-99823  a9789380017730c70.00  aEN-83355  bDBAD/PUB  a574  aViswanathan, M.  aEnvironmental biology /c by M. Viswanathan  aChennaibToday Publicationc2009  bChennaie5a192 Bells Road,Chennai  a113p.c20cm (pbk)