Derek J. de Solla (Derek John de Solla) Price
On the Origin of Clockwork, Perpetual Motion Devices, and the Compass
Derek J. de Solla (Derek John de Solla) Price · 2009
Public domain, Project Gutenberg. No sign-up.
Clocks and watchesHorology
Derek J. de Solla (Derek John de Solla) Price · 2009
Public domain, Project Gutenberg. No sign-up.