Não informado. (1942). Monthly Notes of the Astronomical Society of South Africa. Astronomical Society of Southern Africa.
Chicago-viite (17. p.)Não informado. Monthly Notes of the Astronomical Society of South Africa. Cape Town, Africa do Sul: Astronomical Society of Southern Africa, 1942.
MLA-viite (8. p.)Não informado. Monthly Notes of the Astronomical Society of South Africa. Astronomical Society of Southern Africa, 1942.
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