Montague Butler, G. Handbook of mineralogy, blowpipe analysis and geometrical crystallography.
Lua i Stíl Chicago (17ú heag.)Montague Butler, G. Handbook of Mineralogy, Blowpipe Analysis and Geometrical Crystallography.
Lua MLA (8ú heag.)Montague Butler, G. Handbook of Mineralogy, Blowpipe Analysis and Geometrical Crystallography.
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