http://book.klll.cc/ebooks/author/34299.opds?sort_order=title 2025-11-15T11:21:37Z Books by Price, Derek J. de Solla (Derek John de Solla) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-15T11:21:37Z https://en.wikipedia.org/wiki/Derek_de_Solla_Price See also: en.wikipedia 2025-11-15T11:21:37Z https://book.klll.cc/ebooks/30001.opds On the Origin of Clockwork, Perpetual Motion Devices, and the Compass Derek J. de Solla Price