000 00319nam a2200121Ia 4500
008 211224s9999 xx 000 0 und d
020 _a9788178844237
082 _a363.7392 WAD
100 _aWadhwa, Yash Pal
245 0 _aAir pollution : causes and control
260 _aNew Delhi:
_bCyber Tech,
_c2009
300 _a248 p
999 _c13883
_d13883