Introduction to socialism / Leo Huberman and Paul M. Sweezy. With an introductory essay by Albert Einstein. Huberman, Leo 1903-1968. Sweezy, Paul M. (Paul Marlor), joint author. Socialism. 336.5 HUI New York : Monthly Review, 1968. 1968. 1968 Text 127 p. ; eng Modern reader paperbacks, MR10