TY  - BOOK
AU  - Anderton Pamela
AU  -  Bigg P H
TI  - Changing to the metric system:  Conversion factors,symbols and definition   
SN  - 11 480029 4
U1  - X:5e.3.N7, L2 
PY  - 1972///
CY  - London
PB  - National Physiacl Laboratory        
KW  - Trade
N1  - Appendix: P 33-50
ER  -