Title: Los cazas soviéticos en la guerra aérea de España, 1936-1939
Subjects: Aerial operations, Fighter planes, History, Polikarpov (Fighter planes), Spain Civil War, 1936-1939, Polikarpov aircraft, Polikarpov I-15 (Fighter plane), Polikarpov I-16 (Fighter plane)
Places: Soviet Union, Spain
Time periods: Civil War, 1936-1939