TY  - BOOK
AU  - NATIONAL PHYSICAL LABORATORY
ED  - NATIONAL PHYSICAL LABORATORY
TI  - Annual  report,1955-66
U1  - X9(E).281.N69<N65r, K9 
PY  - 1969///
CY  -  New Delhi 
PB  - NPL         
N1  - Appendix :123-124p
ER  -