Characterization of the Gent Stacked Filter Unit 'PM ind. 10' Sampler - Hopke, Philip K; Xie, Ying; Raunemaa, Taisto; Biegalski, Steven; Landsberger, Sheldon; Maesnhaut, Willy; Artaxo Netto, Paulo Eduardo; Cohen, David (Aerosol Science and Technology, 1997)