TY  - BOOK
AU  - NATIONAL PHYSICAL LABORATORY
ED  - NATIONAL PHYSICAL LABORATORY
TI  - Tests of watches and chronometers
U1  - "a9917(F).N51, J1" 
PY  - 1951///
CY  - London
PB  - NPL       
N1  - Appendix: 9-14P; WEEDED OUT
ER  -