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	1.	Representaciones sobre roca de la Supernova de 1054 D.C : informe de adelantos by Brandt, John Williamson, Ray Series: América nuestra: América antigua Material type: Article; Format: print ; Literary form: Not fiction Language: Spa In: Astronomía en la América antigua p. 214-221 : ill. Availability: No items available.
	2.	Observatorios solares de los indios Anasazis by Williamson, Ray Fischer, Howard O'Flynn, Donnel Series: América nuestra: América antigua Material type: Article; Format: print ; Literary form: Not fiction Language: Spa In: Astronomía en la América antigua p. 246-262 : ill., graph., tab. Availability: No items available.

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