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61-K 37 mmTài liệu tham khảo
WikiPedia: 61-K_37_mm http://hocvienpkkq.com/tin/index.php/vi/news/Phong... http://www.russianammo.org/ http://www.russianammo.org/37mm.html#20 http://giaoduc.net.vn/Giao-duc-Quoc-phong/Thiet-bi... http://www.qdnd.vn/qdndsite/vi-VN/61/43/4/4/41/458... https://web.archive.org/web/20091023155035/http://... https://web.archive.org/web/20120818024146/http://... https://commons.wikimedia.org/wiki/61-K_37_mm_gun?...