“Letter to Friedrich Engels (13 February 1863), quoted in The Collected Works of Karl Marx and Friedrich Engels: Volume 41. Letters 1860-64 (2010), p. 453”
Source: Wikiquote
“Letter to Friedrich Engels (13 February 1863), quoted in The Collected Works of Karl Marx and Friedrich Engels: Volume 41. Letters 1860-64 (2010), p. 453”
Source: Wikiquote