		Geología / Dougal Dixon ; traducción y revisión, Enrique Dauner by Dixon, Dougal Publication: Barcelona :Martínez Roca 1994 Physical description: 160 p. :il. col. ;25cm Availability: Items available for loan: IES Valadares (1),
		La Prehistoria / Dougal Dixon by Dixon, Dougal Publication: Alcobendas (Madrid) : Libsa 2002 Physical description: 46 p. : il. cor. ; 23 cm. Availability: Items available for loan: IES Valadares (1),

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