Columbia subject headings:
Harvard subject headings:
Europe, Eastern--History--20th century.
Europe, Eastern--Politics and government--20th century.
Europe, Western--History--20th century.
Europe, Western--Politics and government--20th century.
Imperialism--History--20th century
Russia--Politics and government--1894-1917.
World War, 1914-1918
Princeton subject headings:
Europe, Eastern--History--20th century.
Europe, Eastern--Politics and government--20th century.
Europe, Western--History--20th century.
Europe, Western--Politics and government--20th century.
Imperialism--History--20th century.
Russia--Politics and government--1894-1917.
World War, 1914-1918.