00299nam a2200109Ia 450000500170000000800410001708200180005810000160007624500480009226000390014030000100017920260205050709.0260111s9999||||xx |||||||||||||| ||und||  a614.71  AK47E  aRais Akhtar 0aEnvironmental pollution and health problems  aNew DelhibAshish pub. housec1990  a377p.