"British Empire/ Colonies and Protectorates"(PDF). Armaments year-book : general and statistical information. Series of League of Nations publications. IX, Disarmament. Vol. A.37.1924.IX. Geneva: League of Nations. 1924. p. 123. Archived from the original(PDF) on 26 April 2016. Retrieved 20 October 2018.
Huon, Jean (September 2013). "The Chaco War". Small Arms Review. Vol. 17, no. 3. Archived from the original on 19 August 2019. Retrieved 17 November 2018.
Segel, Robert G. (August 2014). "The Lewis Gun". Small Arms Review. Vol. 18, no. 4. Archived from the original on 11 May 2021. Retrieved 24 October 2018.
"British Empire/ Colonies and Protectorates"(PDF). Armaments year-book : general and statistical information. Series of League of Nations publications. IX, Disarmament. Vol. A.37.1924.IX. Geneva: League of Nations. 1924. p. 123. Archived from the original(PDF) on 26 April 2016. Retrieved 20 October 2018.
Huon, Jean (September 2013). "The Chaco War". Small Arms Review. Vol. 17, no. 3. Archived from the original on 19 August 2019. Retrieved 17 November 2018.
Segel, Robert G. (August 2014). "The Lewis Gun". Small Arms Review. Vol. 18, no. 4. Archived from the original on 11 May 2021. Retrieved 24 October 2018.