Não informado. (1928). Monthly list books catalogued in the Library of the United nations. United Nations Library.
Citace podle Chicago (17th ed.)Não informado. Monthly List Books Catalogued in the Library of the United Nations. Geneve, Suíça: United Nations Library, 1928.
Citace podle MLA (8th ed.)Não informado. Monthly List Books Catalogued in the Library of the United Nations. United Nations Library, 1928.
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