Trewartha, G. T. (1978). The More developed realm: A geography of its population. Pergamon Press.
Chicago-viite (17. p.)Trewartha, Glenn Thomas. The More Developed Realm: A Geography of Its Population. Oxford: Pergamon Press, 1978.
MLA-viite (9. p.)Trewartha, Glenn Thomas. The More Developed Realm: A Geography of Its Population. Pergamon Press, 1978.
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