Hoffmann, L. (1978). Astronomia: Nova carta celeste. AGGS Insdústrias Gráficas.
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Dyfyniad Arddull Chicago
Hoffmann, Linneu. Astronomia: Nova Carta Celeste. Rio de Janeiro: AGGS Insdústrias Gráficas, 1978.
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Dyfyniad MLA
Hoffmann, Linneu. Astronomia: Nova Carta Celeste. AGGS Insdústrias Gráficas, 1978.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.