00500nam 2200157z- 450 9910712722303321(CKB)5470000002496953(EXLCZ)99547000000249695320230509c1964uuuu -u- -engAuto-exhaust proportional sampler stability analysisU.S. Environmental Protection AgencyWashington, D.CBOOK9910712722303321Auto-exhaust proportional sampler stability analysis3269589UNINA