TY  - RPRT
TI  - Letter Circular 13 (Communication B507): inspection of taper thread gages
PY  - 1919
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 13r1919
DO  - 10.6028/NBS.LCIRC.13r1919
ER  -