Oboronnoe mogushchestvo Rodiny /
Popkov, Mikhail Danilovich.
Erickson, John,1929-2002,former owner.StEdNL
Erickson, Ljubica,former owner.StEdNL
Moskva : Izd-vo DOSAAF SSSR,
1988.
John and Ljubica Erickson collection.