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Lua i Stíl Chicago (17ú heag.)Gottlieb, Manuel. Long Swings in Urban Development. New York: National Bureau of Economic Research, 1976.
Lua MLA (9ú heag.)Gottlieb, Manuel. Long Swings in Urban Development. National Bureau of Economic Research, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.