Columbia subject headings:
World War, 1914-1918--Russia--Congresses.
World War, 1914-1918--Russia--History--Congresses.
Harvard subject headings:
World War, 1914-1918--Russia--Congresses.
World War, 1914-1918--Russia--History--Congresses.
Princeton subject headings:
Russia--History, Military--1801-1917--Congresses.
Russia--History--20th century--Congresses.
Soviet Union--History--20th century--Congresses.
World War, 1914-1918--Economic aspects--Russia--Congresses.
World War, 1914-1918--Political aspects--Russia--Congresses.
World War, 1914-1918--Russia--Congresses.
World War, 1914-1918--Social aspects--Russia--Congresses.
World War, 1914-1918--Soviet Union--Congresses.