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Weaver 1947, pp. 396–399, 494 Weaver, Herbert (1947). Frank Craven, Wesley; Lea Cate, James (eds.). "Chapter 14: Commitments to China"(PDF). The Army Air Forces in World War II: Plans and Early Operations January 1939 to August 1942. Air Force Historical Studies Office. pp. 484–513. Archived from the original(PDF) on 28 January 2016. Retrieved 15 November 2013.