TY  - RPRT
TI  - Letter Circular 831: the painting of exterior metal surfaces (superseding Letter Circular 422)
AU  - Hickson, EF
AU  - Porter, WC
PY  - 1946
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 831
DO  - 10.6028/NBS.LCIRC.831
ER  -