TY  - RPRT
TI  - Letter Circular 544: policy of the National Bureau of Standards with regard to tests for agencies outside the Bureau
PY  - 1939
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 544
DO  - 10.6028/NBS.LCIRC.544
ER  -