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

3^rd place

3^rd place

books.google.com (Global: 3^rd place; English: 3^rd place)

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. {{cite book}}: ISBN / Date incompatibility (help)