TY  - BOOK
AU  - Needham, Joseph
TI  - Science and civilisation in China [Vol.4, Pt. 2]
U1  - 509.51 
PY  - 1991///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Science -- China -- History
KW  - Technology -- China -- History
N1  - Contents: V.4 -- Physics and physical technology Pt. 2 -- Mechanical engineering
ER  -