00494nam a22001817a 450000500170000001000150001702000260003203500130005803700130007108200080008410000200009224500610011226000470017327000540022030000320027470000030030670000030030920100813150344.0  aENG-100183  a9788190715379c165.00  aEN-83715  aDBAD/PUB  a628  aA. Ravikrishnan  aEnvironmental scince & engineering /cby A. Ravikrishnan  aVindavasibThruvalluvar Publicationsc2008  aArunachal City, Chetpet Road, bVindavasie604505  averious pegingsc18cm (Pbk)