L.G. Berry, B. M. Mineralogy concepts descriptions determinations. W.H. Freeman.
Lua i Stíl Chicago (17ú heag.)L.G. Berry, Brian Mason. Mineralogy Concepts Descriptions Determinations. W.H. Freeman.
Lua MLA (8ú heag.)L.G. Berry, Brian Mason. Mineralogy Concepts Descriptions Determinations. W.H. Freeman.
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