TY  - RPRT
TI  - Letter Circular 742: list of commercial standards (supersedes Letter Circular 732)
PY  - 1944
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 742r1944
DO  - 10.6028/NBS.LCIRC.742r1944
ER  -