TY  - RPRT
TI  - Letter Circular 654: alphabetical list of simplified practice recommendations (supersedes Letter Circular 629)
PY  - 1941
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 654r1941
DO  - 10.6028/NBS.LCIRC.654r1941
ER  -