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    Guest editorial

    Hartgen, David T. | Online Contents | 1989

    Getting to Yes in Environmental Protection

    Hartgen, David T. | Online Contents | 1993

    Viewpoint

    Hartgen, David T. | Online Contents | 1988

    Transportation energy contingency plans

    Hartgen, David T. | Online Contents | 1982

    Transit's role

    Hartgen, David T. | Online Contents | 1978

    Coming in the 1990s: The agency-friendly travel survey

    Hartgen, David T. | Online Contents | 1992

    Incremental Regionalism: Staged Approach to Development of Regional Transportation Organizations

    Hartgen, David T. / McCoy, William J. / Walcott, Wayne A. | Transportation Research Record | 2019

    A dynamic model of travel mode switching behaviour

    Hartgen, David T. | Online Contents | 1974