TY  - BOOK
AU  - Derek J. De Solla Price
TI  - On the Origin of Clockwork, Perpetual Motion Devices, and the Compass
KW  - Technology
UR  - https://new.zodml.org/sites/default/files/2023-07/on_the_origin_of_clockwork_perpetual_motion_devices_and_the_compass_by_derek_j._de_solla_price_tag_clocks_and_watches_horology.epub
ER  -