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Sukhoi Su-28 - Wikipedia
Sukhoi Su-25 - Wikipedia
Su-25 (Su-28) Frogfoot Close-Support Aircraft - Airforce Technology
Sukhoi Su-24 - Wikipedia
Sukhoi Su-28 - Wikiwand articles
Sukhoi Su-28 NATO Code: Frogfoot - YouTube
Su-28 / Su-25UT (Frogfoot B) Training aircraft - GlobalSecurity.org
Sukhoi Su-28 - WikiMili, The Best Wikipedia Reader
Sukhoi Su-28 - Detailed Pedia
Su-25UTG - WARPLANEDATA
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