'"The evolution of the Comintern (1919-36)" is reprinted from "Documents of the Fourth International (1933-40)" ... 1973 by Pathfinder Press, Inc. "The history of the Left Opposition (1922-33)" first appeared as two series of articles from December 1, 1972, to March 30, 1973, and from December 28, 1973, to February 1, 1974, in "The Militant" ...' - title page verso.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The first three Internationals : their history and lessons by George Novack. ISBN 0873483677. Published by Pathfinder Press in 1974. Publication and catalogue information, links to buy online and reader comments.
