TY  - BOOK
AU  - Ullyett,Kenneth
AU  - Battersby,Martin
ED  - Science Service
TI  - Clocks and watches
SN  - 0600002896
U1  -  681.11 23rd ed.
PY  - 1971///
CY  - London
PB  - Sun Books
KW  - Clocks and watches
KW  - History
ER  -