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Lua i Stíl Chicago (17ú heag.)DENTON, Frank T. Population and the Economy. Westmead, Hants.: Saseon House, 1975.
Lua MLA (9ú heag.)DENTON, Frank T. Population and the Economy. Saseon House, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.