Text document in PDF format.; Title from PDF title page (viewed on July 29, 2009).; Performed by University of Leeds, Institute for Transport Studies.; Authors: Greg Marsden, Karen Trapenberg Frick, Anthony D. May, Elizabeth Deakin.; "12 May...
Text document in PDF format.; Title from PDF title page (viewed on February 7, 2011).; "November 2010."; Reprint. Originally published in Transport Policy.; Includes bibliographical references (p. 11-12).
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