Columbia subject headings:
Authors, Russian--20th century--Biography.
Bulgakov, Mikhail, 1891-1940.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti--Archival resources.
T︠S︡K KPSS--Archival resources.
Harvard subject headings:
Authors, Russian--20th century--Biography
Bulgakov, Mikhail, 1891-1940
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti--Archival resources.
T︠S︡K KPSS--Archival resources.
Princeton subject headings:
Authors, Russian--20th century--Biography.
Bulgakov, Mikhail, 1891-1940.
Soviet Union. Komitet gosudarstvennoĭ bezopasnosti--Archives.
T︠S︡K KPSS. Arkhiv