%0 Journal Article %T Effects of Errors on Vehicle Emission Rates from Portable Emissions Measurement Systems %A Sandhu, Gurdas S. %A Frey, H. Christopher %J Transportation Research Record %V 2340 %N 1 %P 10-19 %@ 0361-1981 %D 2013-01-01 %I SAGE Publications %~ DeepDyve