00297nam a22001217a 4500020001500000082001400015100002100029245002600050260005300076300000700129490001400136650002500150  a9559666614  a551.5 DER  aDeraniyagala,S.P  aAtmospheric Chemistry  aColombobUniversity of Sri Jayawardenepurac1999  a35  aMonograph  aatospheric chemistry