The challenge of the Left opposition /
Trotsky, Leon,1879-1940.
New York Pathfinder Press
1975-
"Books and pamphlets by Leon Trotsky": v. 1, p. [429]
Includes index
Bibliography: v. 1, p. 421-422
[1] 1923-25 -- [2] 1926-27.
Communism