TY  - BOOK
AU  - Needham, Joseph, [et.al.]
TI  - Heavenly Clockwork: Great astronomical clocks of medieval china
SN  - 0521322766
U1  - 529.78 
PY  - 1986///
CY  - London
PB  - Cambridge
KW  - Astronomical clocks-china-history-
ER  -