3. Urban crisis: culture and the sustainability of cities Tokyo ; United Nations University Press, c2007. SOC311
4. The urban question: a Marxist approach Castells, Manuel, 1942- Cambridge : MIT Press, 1977. HIST460
5. Triumph of the city: how our greatest invention makes us richer, smarter, greener, healthier, and happier Glaeser, Edward L. (Edward Ludwig), 1967- New York : Penguin Books, 2011. SOC333
6. The city and the grassroots: a cross-cultural theory of urban social movements Castells, Manuel, 1942- Berkeley, Calif. : University of California Press, c1983. HIST350
