Não informado. (1969). IFLA Annual. International Federation of Library Associations and Institutions.
Cita Chicago Style (17a ed.)Não informado. IFLA Annual. Munich, Alemanha: International Federation of Library Associations and Institutions, 1969.
Cita MLA (8a ed.)Não informado. IFLA Annual. International Federation of Library Associations and Institutions, 1969.
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