http://book.klll.cc/ebooks/subject/30498.opds 2025-08-20T02:34:27Z Books about Newton, Isaac, 1642-1727. Principia (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 2025-08-20T02:34:27Z https://book.klll.cc/ebooks/53161.opds A View of Sir Isaac Newton's Philosophy Henry Pemberton