- HTML (Multi-page, indexed) at Marxists.org (Translator unknown)
- PDF (1.69MB; page down, link should be #40 in the list of documents) at Eddie Jackson's Philosophy Library (Translated by J. Sibree)
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- Paperback edition, translated by J. Sibree (Prometheus Books, 1990, 467 pg).
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All links verified on or after October 19, 2020