Schwarzlose machine gun (English Wikipedia)

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books.google.com

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Peterson 2013, p. 34 Peterson, Phillip (18 October 2013). Standard Catalog of Military Firearms: The Collector's Price and Reference Guide. Iola, Wisconsin: Krause Publications. ISBN 978-1-4402-3692-1.
Chant 2002, p. 89 Chant, Christopher (2002). A Century of Triumph: The History of Aviation. New York: Simon & Schuster. ISBN 978-0-7432-3479-5.
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Peterson 2007, p. 286 Peterson, Phillip (24 September 2007). Standard Catalog of Military Firearms: The Collector's Price and Reference Guide. Gun Digest Books. ISBN 978-1-4402-3046-2.

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Anyathor007 (18 August 2012). "The Birth of Israel". YouTube. Archived from the original on 21 December 2021. Retrieved 12 December 2015.{{cite web}}: CS1 maint: numeric names: authors list (link)

防衛庁防衛研修所戦史室 (November 1969). 海軍軍戦備＜1＞昭和十六年十一月まで. 戦史叢書. Vol. 31. 朝雲新聞社. pp. appendix sheet 1-1, 2–1.

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Williams, Anthony G. "Synchronisation systems" (PDF). Military Guns & Ammunition. Based on "Flying Guns: World War I" and "Flying Guns: World War II" by Anthony G Williams and Emmanuel Gustin.

Brigada Militar (August 2011). "Brigada Militar na Legalidade" (PDF) (in Brazilian Portuguese). Porto Alegre: Corag. Archived (PDF) from the original on 11 April 2021. Retrieved 10 April 2021.
"四川機器局" [Sichuan Machinery Bureau]. ChineseFirearms.com (in Chinese). Archived from the original on 17 April 2021.

Anyathor007 (18 August 2012). "The Birth of Israel". YouTube. Archived from the original on 21 December 2021. Retrieved 12 December 2015.{{cite web}}: CS1 maint: numeric names: authors list (link)