Não informado. (1968). Hokudai Economic Papers. Hokkaido University, Faculty of Economics and Business Administration.
Chicago-referens (17:e uppl.)Não informado. Hokudai Economic Papers. Hokkaido, Japão: Hokkaido University, Faculty of Economics and Business Administration, 1968.
MLA-referens (8:e uppl.)Não informado. Hokudai Economic Papers. Hokkaido University, Faculty of Economics and Business Administration, 1968.
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