First printed in 1975, this edition is the second printing by Progress Publishers, Moscow, 1979, 582 pages.
This collection includes works by V. I. Lenin, dealing with the criticism of opportunism, its main trends and the analysis of its sources and social roots. All the material is arranged in chronological order. The translations are taken from the English edition of V.I. Lenin's Collected Works, Progress Publishers.
Printed in the Union of Soviet Socialist Republics