000 00271pam a2200109a 44500
008 230405s1989 xxu||||| |||| 00| 0 eng d
041 _aENG
100 _aM.N.Rao
245 _aAir Pollution
260 _anew delhi
_bTata McGraw Hill Publishing Co.
_c1989
906 _a14101
999 _c304600
_d304600