TY  - RPRT
TI  - Letter Circular 1120: Guidelines for use of the modernized metric system (supersedes Letter Circular 1056)
PY  - 1979
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 1120r1979
DO  - 10.6028/NBS.LCIRC.1120r1979
ER  -