Polar organic compounds in rural PM2.5 aerosols from K-puszta, Hungary, during a 2003 summer field campaign: sources and diurnal variations. - Ion,A..C..; Vermeylen,R..; Kourtchev,I..; Cafmeyer,J..; Chi,X..; Gelencser,A..; Maenhaut,W..; Claeys,M.. (Atmospheric Chemistry and Physics, 2005)