Srinivasa Ramanujan
India Post, Government of India
GODL-India
<a rel="nofollow" class="external autonumber" href="https://web.archive.org/web/20180301154142/http://postagestamps.gov.in:80/Stamps2012.aspx">[1]</a> <a rel="nofollow" class="external autonumber" href="https://colnect.com/en/stamps/stamp/392526-National_Mathematics_Day-India">[2]</a>