Book sources. Wikipedia. [2018-06-14]. (原始内容存档于2022-05-05) (英语).
Bird, Lorrin Rexford. World War II ballistics: armor and gunnery. Albany, N.Y.: Overmatch Press https://www.worldcat.org/oclc/71143143. 2001 [2018-06-14]. (原始内容存档于2019-10-18) (英语).缺少或|title=为空 (帮助)
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Book sources. Wikipedia. [2018-06-14]. (原始内容存档于2022-05-05) (英语).
Bird, Lorrin Rexford. World War II ballistics: armor and gunnery. Albany, N.Y.: Overmatch Press https://www.worldcat.org/oclc/71143143. 2001 [2018-06-14]. (原始内容存档于2019-10-18) (英语).缺少或|title=为空 (帮助)