TY  - RPRT
TI  - Letter Circular 587D: enamels (supersedes Letter Circular 131D)
PY  - 1940
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 587D
DO  - 10.6028/NBS.LCIRC.587D
ER  -