		Rocas y minerales : Minerales, Piedras preciosas, Rocas, Menas / Walter Schumann by Schumann, Walter Publication: Barcelona :Omega 1988 Physical description: 226 p :il ;20cm Availability: Items available for loan: IES As Mariñas (1),
		Guía dos minerais de Galicia / Juan Carlos Mirre by Mirre, Juan Carlos Publication: Vigo :Galaxia 1990 Physical description: 194 p., [4] h. de lám., [1] map. pleg :il ;20cm Academic level: 1º-2º BAC Availability: Items available for loan: IES As Mariñas (1),

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