“Letter to Friedrich Engels (8 October 1858), quoted in The Collected Works of Karl Marx and Friedrich Engels: Volume 40. Letters 1856-59 (2010), pp. 346-347”
Source: Wikiquote
“Letter to Friedrich Engels (8 October 1858), quoted in The Collected Works of Karl Marx and Friedrich Engels: Volume 40. Letters 1856-59 (2010), pp. 346-347”
Source: Wikiquote