Não informado. (1960). International Bibliography of the Social Sciences. Unesco, International Committee for Social Sciences Documentation.
Chicago-referens (17:e uppl.)Não informado. International Bibliography of the Social Sciences. Paris: Unesco, International Committee for Social Sciences Documentation, 1960.
MLA-referens (8:e uppl.)Não informado. International Bibliography of the Social Sciences. Unesco, International Committee for Social Sciences Documentation, 1960.
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