TY  - BOOK
AU  - U.S.Commerece (Dept.of) Standards (National Bureau of).
TI  - Metrology of gage block: Proceedings of a symposium held at NBS on Aug.11 and 12 1955
U1  - 621.99 
PY  - 1957///
PB  - Supdt. of Documents
ER  -