League of Nations & International Economic Conference. (1927). International economic conference, Geneva, May 1927. Natural movement of populations during the first quarter of the twentieth century. [s.n.].
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিLeague of Nations এবং International Economic Conference. International Economic Conference, Geneva, May 1927. Natural Movement of Populations During the First Quarter of the Twentieth Century. Geneva: [s.n.], 1927.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিLeague of Nations এবং International Economic Conference. International Economic Conference, Geneva, May 1927. Natural Movement of Populations During the First Quarter of the Twentieth Century. [s.n.], 1927.
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