TY  - RPRT
TI  - Letter Circular 867: wood and shingle stains (superseding Letter Circular 464)
PY  - 1947
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 867
DO  - 10.6028/NBS.LCIRC.867
ER  -