Gemstone File (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Gemstone File" in English language version.

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archive.org

  • James McConnachie; Robin Tudge (1 September 2008). The Rough Guide To Conspiracy Theories. Penguin. pp. 131–. ISBN 978-1-4053-8385-1. Retrieved 23 May 2012. The Rough Guide To Conspiracy Theories gemstone.

books.google.com

worldcat.org

search.worldcat.org

  • "Glossary", Factsheet Five, no. 44, p. 86, August 1991, ISSN 0890-6823