TY  - RPRT
TI  - Letter Circular 978: list of commercial standards (supersedes Letter Circular 956)
PY  - 1950
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 978r1950
DO  - 10.6028/NBS.LCIRC.978r1950
ER  -