Portland study interim analysis : update with nine months of vehicle operation.

Bibliographic Details
Format:	Government Document eBook
Language:	English
Published:	[Ann Arbor, Mich.] : Emission Control Technology Division, Office of Mobile Source Air Pollution Control, Office of Air, Noise, and Radiation, U.S. Environmental Protection Agency, 1979.
Subjects:	Automobiles > Motors > Exhaust gas > United States > Observations. Automobiles > United States > Motors > Maintenance and repair > Observations. Automobiles > Inspection > United States > Observations. Air > Pollution > United States > Observations.
Online Access:	https://purl.fdlp.gov/GPO/gpo132084

Description
Item Description:	"IMS-004/PS-2." "May 1979."
Physical Description:	1 online resource (14 pages in various pagings) : illustrations