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	1.	No cover image available Controle e avaliaçao de erros em prospecçao geoquímica by Quintanilha, José Suslick, Saul Lewis, Richard Material type: Article; Format: print Language: Por In: Geociências 7, 1988, p. 317-319 Availability: No items available.
	2.	No cover image available Geology and mineralogy of the Castrovirreyna mining district, Huancavelica by Lewis, Richard Congreso nacional de geología, 1 ( 21-27 nov., 1955 : Lima) Material type: Article; Format: print Language: Eng In: Boletín de la Sociedad geológica del Perú 30, 1956, p. 217-224 : carte Availability: No items available.

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