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A. ALPHA WORLD CITIES (full service world cities)
12: London, New York, Paris, Tokyo
C. GAMMA WORLD CITIES (minor world cities)
6: Amsterdam, Boston, Caracas, Dallas, D?sseldorf, Geneva, Houston, Jakarta, Johannesburg, Melbourne, Osaka, Prague, Santiago, Taipei, Washington
http://www.lboro.ac.uk/gawc/citylist.html http://www.lboro.ac.uk/gawc/citymap.html