Columbia subject headings:
Harvard subject headings:
Espionage--Soviet Union--Fiction.
Gast, Gabriele, 1943---Fiction.
Plevit︠s︡kai︠a︡, Nadezhda Vasilʹevna, 1884-1940--Fiction.
Spy stories.
Princeton subject headings:
Espionage--Soviet Union--Fiction.
Fiction.
Gast, Gabriėle--Fiction.
Plevit︠s︡kai︠a︡, Nadezhda Vasilʹevna, 1884-1940--Fiction.