استیرمن ایکس‌ای-۲۱ (Persian Wikipedia)

Analysis of information sources in references of the Wikipedia article "استیرمن ایکس‌ای-۲۱" in Persian language version.

refsWebsite

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1web.archive.org

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web.archive.org

"Stearman XA-21 (Streamlined Cockpit)." Museum of the United States Air Force. Retrieved: 17 July 2017.