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1650s BC

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This is an old revision of this page, as edited by Cydebot (talk | contribs) at 12:18, 29 April 2015 (Robot - Moving category 1650s BC to Category:17th century BC per CFD at Wikipedia:Categories for discussion/Log/2015 April 20.). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

References

  1. ^ Jan Gullberg, C13 Trigonometry, Maths from Birth of Numbers, W. W. Norton in 1997 (ISBN 039304002X )