TY  - BOOK
ED  - United Kingdom, National Physical Laboratory.
TI  - Notes on screw guages
U1  - 621.882 
PY  - 1938///
CY  - London
PB  - His Majesty's Stationary Office
KW  - Metrology
KW  - Gauge Calibration
KW  - Thread Inspection
N1  - Includes index
ER  -