BT-12 (航空機) (Japanese Wikipedia)

Analysis of information sources in references of the Wikipedia article "BT-12 (航空機)" in Japanese language version.

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Pitkin, Walter (1942). What's That Plane?: The Handbook for Practical Aircraft Identification (2nd ed.). New York: Penguin Books. p. 60. ASIN B001DEMTMO
Historical Office of the Army Air Forces (1947). The official pictorial history of the AAF. New York: Duell, Sloan and Pierce. p. 177. ASIN B000GU84Z2