Não informado. (1967). Irregular Serials & Annuals. R. R. Bowker.
Lua i Stíl Chicago (17ú heag.)Não informado. Irregular Serials & Annuals. New York: R. R. Bowker, 1967.
Lua MLA (8ú heag.)Não informado. Irregular Serials & Annuals. R. R. Bowker, 1967.
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