YO-51 蜻蜓聯絡機 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "YO-51 蜻蜓聯絡機" in Chinese language version.

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archive.org

Foottit, H. R. The Fowler Flap. Flying and Popular Aviation (Chicago: Ziff-Davis Publishing Co.). February 1942, 30 (2): 71.

nytimes.com

Army Tests New B-17C. The New York Times (New York). November 17, 1940 [2012-08-11]. （原始内容存档于2022-12-15）.

web.archive.org

Army Tests New B-17C. The New York Times (New York). November 17, 1940 [2012-08-11]. （原始内容存档于2022-12-15）.