TY  - RPRT
TI  - Letter Circular 560: list of weights and measures offices of the States and District of Columbia (supersedes Letter Circular 390)
PY  - 1939
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 560
DO  - 10.6028/NBS.LCIRC.560
ER  -