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How effective were the 37mm on German aircraft against tanks? - Quora
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Kalamita Bay P-39 Russian 2020 37mm cannon | laststandonzombieisland
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Type 55 37mm anti-aircraft gun system technical data sheet specifications description pictures video | China Chinese army light heavy weapons UK | Chinese China army military equipment armoured UK
HyperWar: The Machine Gun (Vol. I/Part V)
Soviet 37-mm antiaircraft gun K-61 (early variant) Unimodels 516
