By Chen P.H.   Leung K.C.   Wang J.T.   in Environment International

ISSN:0160-4120|26|1|63-68

Elsevier‎(2000)‎

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By Goderya S.N.   Leung K.C.   Schmidt E.G.   in Astrophysics and Space Science

ISSN:0004-640X|243|2|315-328

Springer Publishing Company ‎(1996)‎

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