00284nam a2200121 a 450000500170000002000150001708200190003210000140005111000200006524500250008526000310011030000210014120251203091902.0  a8122404367  a363.7,bD, ray  aRay, P.K.  aPrasad, Arun K.  aPollution and health  aDelhibWiley Easternc1992  aviii, 158p, 22cm