Krile spisanie za aviatsii︠a︡ i kosmonavtika.
880-02Andreev, Todor,editor.
Erickson, John,1929-2002,former owner.StEdNL
Erickson, Ljubica,former owner.StEdNL
Bulgaria.Ministerstvo na narodnata otbrana.
John and Ljubica Erickson collection.