http://book.klll.cc/ebooks/author/6426.opds?sort_order=release_date 2025-11-14T08:47:03Z Books by Copernicus, Nicolaus Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-14T08:47:03Z https://en.wikipedia.org/wiki/Nicolaus_Copernicus See also: en.wikipedia 2025-11-14T08:47:03Z https://book.klll.cc/ebooks/13182.opds Prefaces and prologues to famous books : with introductions, notes and illustrations Aug 15, 2004