TY  - RPRT
TI  - Letter Circular 671: sources of information on paint and related materials (replacing Letter Circular 478 and 542)
PY  - 1941
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 671
DO  - 10.6028/NBS.LCIRC.671
ER  -