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| module2 = | module3 = | module4 = | module5 = | module6 = | website = | footnotes =〔 Biography in Context. 〕〔 〕〔 〕〔 〕〔 〕〔 〕 | box_width = }} William Leonard Langer (March 16, 1896 – December 26, 1977) was the chairman of the history department at Harvard University. He was on leave during World War II as head of the Research and Analysis Branch of the Office of Strategic Services. He was a specialist on the diplomacy of the 1870-1900, and 1937-41 periods. He edited numerous books including a series on European history, a large-scale reference book, and a university textbook. ==Biography== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「William L. Langer」の詳細全文を読む スポンサード リンク
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