TY  - RPRT
TI  - Letter Circular 659: paint, varnish and bituminous materials (replacing Letter Circular 59, 212, 291 and 574)
PY  - 1941
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 659
DO  - 10.6028/NBS.LCIRC.659
ER  -