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keyword: Kolmozero–Voronya belt – 2 free books.
These books are available in PDF format - good for desktops, printing.
Mineralogy of Noble Metals and “Invisible” Speciations of These Elements in Natural Systems, Volume II
Galina Palyanova (editor)
Mineralogy of Noble Metals and “Invisible” Speciations of These Elements in Natural Systems
Galina Palyanova