Columbia subject headings:
Harvard subject headings:
Grain trade--Russia--History--20th century.
Grain trade--Russia.
Soviet Union--History--Revolution 1917-1921--Food supply.
Soviet Union--History--Revolution, 1917-1921--Economic aspects.
World War, 1914-1918--Economic aspects--Russia
World War, 1914-1918--Food supply--Russia.
Princeton subject headings:
Agriculture and state--Russia.
Agriculture and state--Soviet Union.
Grain trade--Russia.
Grain trade--Soviet Union.
Russia--Economic conditions--1861-1917.
Soviet Union--Economic conditions--1917-1945.
World War, 1914-1918--Economic aspects--Russia.
World War, 1914-1918--Economic aspects--Soviet Union.