1. Is the ‘Darwin-Marx correspondence’ authentic?
2. Marx , Karl and Engles , Friedrich . 1967.WerkeVol. 35, 315–315. Berlin
3. The article in German appeared on 27 April 1882. For the facts concerningLa justicesee Engels Friedrich Lafargue Paul Lafargue LauraCorrespondenceMoscow 3 558 558 (trans. Yvonne Kapp) n.d.
4. Hirsch , Helmut , ed. 1970.Eduard Bernsteins Briefwechsel mit Friedrich Engels94–95. Assen
5. Marx and Engels .WerkeVol. 35, 514–514. Berlin