TY  - BOOK
AU  - Hope-Jones, F.,
TI  - Electrical Timekeeping
SN  - 719800706
U1  - 681.116 
PY  - 1976///
CY  - London
PB  - N. A. G. Press Ltd.
KW  - Electrical Timekeeping
KW  - Precision instruments & other devices
ER  -