00327nam a2200109 a 450000500170000002000150001708200130003210000190004524500820006426000460014630000250019220251203110548.0  a8176295809  a577bMUR  aMurthy, D.B.N.  aEnvironmental Awareness and Protectionba Basic Book on Environmental Studies  aNew DelhibDeep & Deep Publicationsc2004  axxii,241p.c24 cm HB