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A description of the Hotchkiss revolving cannon
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FM 23-67 Field Manual Machinegun 7.62-mm, M60 (1984)
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Handbook of the Vickers machine gun model 1915 with mark IV tripod
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Identification list Gun, machine, Polsten, 20-mm., Mk.1 and magasine, 30 rd.20-mm., Polsten, Mk.1 (1944)djvu
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