GRIL NACO contribution (n.d.)
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Journal of gemmology (London, England : 1986), April 1990: cover (Gemmological Association of Great Britain) page 4 of cover (Gemmoloical Association of Great Britain was originally founded in 1908 as the Education Committee of the National Association of Goldsmiths; reconstituted in 1931 as the Gemmological Association; name was extended in 1938 to Gemmological Association of Great Britain, and in April 1947 it was incorporated in that name); October 1990: page 194 (In October 1931, the GA was formally inaugurated as a National Association of Goldsmiths branch)
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Library of Congress Authorities online (2002-) http://id.loc.gov/authorities/names/no2014042369
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OCLC Worldcat, searched March 3, 2014 (access point: Gemmological Association of Great Britain; usage: Gemmological Association) | | |