References:
- http://factslegend.org/30-interesting-a-p-j-abdul-kalam-facts/2/
- http://www.scoopwhoop.com/news/facts-about-kalam/
- http://viralchronics.com/unknown-facts-about-kalam/
- http://www.indiatvnews.com/news/india/facts-you-should-know-about-apj-abdul-kalam-india-s-missile-man-32510.html?page=3
- http://www.catchnews.com/national-news/6-facts-about-dr-apj-abdul-kalam-you-probably-didn-t-know-1438065212.html
- https://en.wikipedia.org/wiki/A._P._J._Abdul_Kalam
- http://www.toppersnotes.com/10-facts-about-dr-apj-abdul-kalam-to-know/
- http://www.businessinsider.in/Some-lesser-known-facts-about-the-popular-APJ-Abdul-Kalam/articleshow/48253633.cms