00791nam 2200169z- 450 9910712673803321(CKB)5470000002495422(EXLCZ)99547000000249542220230509c1985uuuu -u- -engTech IV credit model : estimates for emission factors and inspection and maintenance credits for 1981 and later vehicles for MOBILE3Emission Control Technology Division, Office of Mobile Sources, Office of Air and Radiation, U.S. Environmental Protection AgencyAnn Arbor, MichTech IV credit model BOOK9910712673803321Tech IV credit model : estimates for emission factors and inspection and maintenance credits for 1981 and later vehicles for MOBILE33304725UNINA