TY  - RPRT
TI  - Letter Circular 750: simplified practice recommendations (supersedes Letter Circular 733)
PY  - 1944
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 750r1944
DO  - 10.6028/NBS.LCIRC.750r1944
ER  -