Journal of gemmology, Oct. 1990: p. 194 (National Association of Goldsmiths; NAG); p.194 (National Association of Goldsmiths
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Library of Congress Authorities online (2002-) http://id.loc.gov/authorities/names/no96007398
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National Association of Jewellers website, viewed 1 November 2018: about page (National Association of Jewellers was formed in 2015 following the merger of the British Jewellers' Association and the National Association of Goldsmiths) | |