TY - JOUR AU - United States. Environmental Protection Agency SN - 0098-7069 PB - United States Environmental Protection Agency TI - Progress in the implementation of motor vehicle emission standards: report to Congress KW - Automobiles -- Motors -- Exhaust gas. KW - Air -- Pollution -- United States. CY - Washington M1 - Accessed from https://nla.gov.au/nla.cat-vn790502 ER -