Worldwatch Institute (COR)
(6)
National Association of City Transportation Officials (COR)
(4)
Paul R. Ehrlich/ Anne H. Ehrlich
(3)
Peter Newman/ Jeffrey Kenworthy
(3)
Steven I. Apfelbaum/ Alan Haney/ Kirsten R. Vinyeta (ILT)
(3)
Andre F. Clewell/ James Aronson
(2)
Andrew M. Barton/ William S. Keeton
(2)