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*[http://4hazara.blogspot.com/ 4th Hazara Mountain Battery] blogspot4hazara.com<br>*[http://en.wikipedia.org/wiki/24th_Hazara_Mountain_Battery_(Frontier_Force) 24th Hazara Mountain Battery (Frontier Force)] Wikipedia<br>*[https://web.archive.org/web/20210411045556/http://www.king-emperor.com/article1Indian%20Mountain%20Artillery.htm html Indian Army Mountain Artillery] www.king-emperor.com, now archived.===Historical books online===*[https://archive.org/details/in.ernet.dli.2015.278775 ''Historical Record Of No 4 (Hazara) Mountain Battery Punjab Frontier Force''] [by W. J. Honner] 1888. Archive.org, mirror from Digital Library of India.