http://book.klll.cc/ebooks/subject/35920.opds 2025-08-09T23:46:46Z Books about Engels, Friedrich, 1820-1895 -- Correspondence (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-09T23:46:46Z https://book.klll.cc/ebooks/64327.opds Der Briefwechsel zwischen Friedrich Engels und Karl Marx 1844 bis 1883, Erster Band (German) Karl Marx and Friedrich Engels