| Registros del 1 al 2 de 2 encontrados |
1.- Gemstones from Cuba
Zwaan, P.C.; Congreso - International Gemmological Conference (21. 1987. Brasil)
[S.l.: s.n.], 1987
Transactions of the XXI International Gemmological Conference: Brazil 1987 = XXI Conferencia Internacional de Gemologia: Brasil 1987: Technical sessions: September 21-25, 1987
C 334-19
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2.- Observations on gemstones and their source rocks from Sri Lanka
Arps, Charles E.S.; Congreso - International Gemmological Conference (21. 1987. Brasil)
[S.l.: s.n.], 1987
Transactions of the XXI International Gemmological Conference: Brazil 1987 = XXI Conferencia Internacional de Gemologia: Brasil 1987: Technical sessions: September 21-25, 1987
C 334-18
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