00670nam 2200157z- 450 9910712543403321(CKB)5470000002494719(EXLCZ)99547000000249471920230509c1974uuuu -u- -engAutomobile exhaust emission modal analysis model extension and refinementAnn Arbor, MichiganU.S. Environmental Protection Agency, Office of Air and Waste Management, Office of Mobile Source Air Pollution Control, Certification and Surveillance DivisionBOOK9910712543403321Automobile exhaust emission modal analysis model extension and refinement3348387UNINA