Columbia subject headings:
Cossacks--History--20th century--Sources.
Cossacks--United States--Biography.
Counterrevolutionaries--Soviet Union--Biography.
Fedorov, N. V. (Nikolaĭ Vasilʹevich)
Vsevelikoe Voĭsko donskoe--Biography.
Harvard subject headings:
Cossacks--Biography.
Don River Region (Russia)--Biography.
Fedorov, N. V. (Nikolaĭ Vasilʹevich)
Immigrants--New York (State)--Biography.
New York (State)--Biography.
Princeton subject headings: