TY  - BOOK
AU  - Bureau of Indian Standards[BIS]
TI  - IS:12257-(Pt.1)-1987. Indian standard specification for pneumatic length measurement comparators. Pt.1 : general information on principles and methods
U1  - IS CODE 
PY  - 1988///
CY  - New Delhi
PB  - Bureau of Indian Standards
N1  - ENG
ER  -