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Lua i Stíl Chicago (17ú heag.)Indian Council of Social Science Research, Jawaharlal Nehru University, agus Asok Mitra. Functional Classification of India's Urban Areas by Factor-cluster Method, 1961-1971. New Delhi: Abhinav, 1981.
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Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.