material within these Archives, unless noted otherwise, is public domain." English Fredrich Engels in 1877 in Brington Turkish Friedrich Engels Arabic انجلز
Marx e Friedrich Engels French Karl Marx et Friedrich Engels Italian Karl Marx e Friedrich Engels German Karl Marx und Friedrich Engels Greek Ο Καρλ Μαρξ
The Life of Friedrich Engels, W. O. Henderson, first published in 1976 Mike Dash (August 1, 2013), “How Friedrich Engels’ Radical Lover Helped Him Father
copyright holder of this work, hereby publish it under the following license: English stone carving of Marx and Engels German Abbild von Marx und Engels