<a href="https://en.wikipedia.org/wiki/Mu%E1%B8%A5ammad_ibn_M%C5%ABs%C4%81_al-%E1%B8%B4w%C4%81rizm%C4%AB" class="extiw" title="en:Muḥammad ibn Mūsā al-Ḵwārizmī">en:Muḥammad ibn Mūsā al-Ḵwārizmī</a>. (He is on a <a href="https://en.wikipedia.org/wiki/Soviet_Union" class="extiw" title="en:Soviet Union">en:Soviet Union</a> <a href="https://en.wikipedia.org/wiki/commemorative_stamp" class="extiw" title="en:commemorative stamp">en:commemorative stamp</a>, issued September 6, 1983. The stamp bears his name and says "1200 years", referring to the approximate anniversary of his birth)
Unknown author<span style="display: none;">Unknown author</span>
1983
<a rel="nofollow" class="external free" href="http://www.muslimheritage.com/topics/default.cfm?ArticleID=631">http://www.muslimheritage.com/topics/default.cfm?ArticleID=631</a>, <a rel="nofollow" class="external autonumber" href="http://www-cs-faculty.stanford.edu/~knuth/graphics.html">[1]</a>