"Version: 4".
"Prepared for Department for Transport, Cleaner Fuels & Vehicles 4, Chris Parkin".
Emission factors 2009: Report 2 - a review of the average-speed approach for estimating hot exhaust emissions by T. J. Barlow. ISBN 9781846088155. Published by IHS in 2009. Publication and catalogue information, links to buy online and reader comments.