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263 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "263" in English language version.

refsWebsite
Global rank English rank
1books.google.com
3rd place
3rd place

books.google.com

  • Needham, Joseph (1959). Science and Civilisation in China: Volume 3, Mathematics and the Sciences of the Heavens and the Earth. Cambridge, England: Cambridge University Press. p. 30. ISBN 978-0-521-05801-8.