TY  - BOOK
AU  - Needham Joseph
AU  - Ling Wang
AU  - Price D J
TI  - Heavenly clock work: the great astronomical clocks of medieval China
U1  - 529.78(51) 
PY  - 1960///
CY  - Cambridge
PB  - Univ. Press
KW  - Astronomical clock
KW  - China
KW  - Time
ER  -