000 00370cam a22001097a 4500
008 180718b1982 xxu||||| |||| 00| 0 eng d
082 _aX91 W893e
245 _aEstimating human exposure to air pollutants
_cby World Health Organization, Switzerland
260 _aGeneva
_bWorld Health Organization
_c1982
300 _a59p.
700 _aSwitzerland. World Health Organization
999 _c498818
_d498818