EPA recommended practice for naming I/M calibration gas.

Bibliographic Details
Corporate Author:	United States. Environmental Protection Agency. Office of Air and Radiation
Format:	Government Document eBook
Language:	English
Published:	Ann Arbor, Mich. : U.S. Environmental Protection Agency, Office of Air and Radiation, Office of Mobile Sources, Emission Control Technology Division, Technical Support Staff, 1983.
Subjects:	Automobiles > Motors > Exhaust gas. Automobiles > Maintenance and repair.
Online Access:	https://purl.fdlp.gov/GPO/gpo137952

Available Online