Heavenly clockwork the great astronomical clocks of medieval China

Name: Heavenly clockwork the great astronomical clocks of medieval China
Rating: 8.9 (2 reviews)
Author: /author/Joseph_Needham_(Science_and_Civilisation_in_China%3A_Volume_1%2C_Introductory_Orientations%3A_Introductory_Orientations_Vol_1)