Columbia subject headings:
Harvard subject headings:
Pstygo, I. I. (Ivan Ivanovich)
World War, 1939-1945--Personal narratives, Russian.
Princeton subject headings:
Pstygo, I. I. (Ivan Ivanovich)
World War, 1939-1945--Aerial operations, Russian.
World War, 1939-1945--Personal narratives, Russian.