A platform for research: civil engineering, architecture and urbanism
CHRYSTAL AMETHYST & CHRYSTAL EMERALD
CHRYSTAL AMETHYST & CHRYSTAL EMERALD
CHRYSTAL AMETHYST & CHRYSTAL EMERALD
HSB international ; 42
1994
Article (Journal)
Dutch
Paramagnetic Centres in Madjarovo Vein Amethyst from Southern Bulgaria
British Library Online Contents | 1992
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