"Condicions econòmiques." . . "Social conditions." . . "Communisme U.R.S.S. 1917-" . . "Condicions socials." . . "1917 - 1945" . . "Economic history." . . . "The soviet power : the socialist sixth of the world"@en . . . . . . . "The soviet power the socialist sixth of the world"@en . . . . . . . "The Soviet power : The socialist sixth of the world" . "The soviet power" . "The soviet power"@en . . "The Soviet power : the socialist sixth of the world" . . "The Soviet Power : the Socialist Sixth of the World" . . . . . . . . . . "The Soviet power; the socialist sixth of the world. With illus. by Nowell Mary Hewlett Johnson"@en . . . . . "The Soviet Power : the socialist sixth of the world" . . . . . . . . . "The soviet power; the socialist sixth of the world"@en . . . . "The Soviet power"@en . "The Soviet power : the socialist sixth of the world. With ill. by Nowell Mary Hewlett Johnson" . . . . . . . "Socialist sixth of the world"@en . . . . "Communism." . . "Política econòmica." . . "Soviet Union" . . "Soviet Union." . "Russia" . . "Unió Soviètica." . . "Communism Soviet Union." . . "Industrialització." . . "Comunisme." . . . . "U.R.S.S." . .