Vehicle Specific Power Approach to Estimating On-Road NH3Emissions from Light-Duty Vehicles Huai, Tao ; Durbin, Thomas D. ; Younglove, Ted ; Scora, George ; Barth, Matthew ; Norbeck, Joseph M. Abstract Publication: Environmental Science and Technology Pub Date: December 2005 DOI: 10.1021/es050120c Bibcode: 2005EnST...39.9595H