- Ebner, Michael, Lake Forest College.
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"American Cities, Suburbs, And The Dual Metropolis" (H-Urban: 10 November 1997)
- Ladd, Brian, State University of New York-Albany (SUNY).
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"Berlin and Urban Modernity" (H-Urban: 13 February 2000)
- Tarr, Joel A, Carnegie Mellon University.
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"The City And The Natural Environment" (H-Urban: 14 January 1998)
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