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BIBLIOGRAPHY

Wikipedia「Witwatersrand Gold Rush」「Gold cyanidation」「California gold rush」

Wikipedia (according to the sources of each article)

Claims Supported by This Source

  1. The Witwatersrand Gold Rush was in 1886.
  2. The MacArthur-Forrest process (cyanidation) in 1887 ("Gold cyanidation").
  3. California, January 24, 1848 ("California gold rush").

How to read the verification levels. 'Read' means the material was read in its entirety. 'Bibliography and abstract confirmed' means the bibliographic information and abstract were verified. 'Via course material' means the source was referenced through the main text of a book or a country's monetary history. The text hash is the SHA-256 of the main text from the original source page, excluding tags and whitespace, used to detect if the material has been altered.