TY  - BOOK
AU  - Trotsky, Leon.
AU  - Allen, Naomi
TI  - The challenge of the left opposition (1923-25)
SN  - 087348424X
U1  - 335.430947 
PY  - 1975///
CY  - New York
PB  - Pathfinder Press
KW  - Communism
KW  - Soviet Union
KW  - Politics and government
KW  - 1917-1936
N1  - Includes bibliographies and indexes
ER  -