TY  - RPRT
TI  - Letter Circular 639: dyeing and finishing of hosiery (supersedes Letter Circular 436)
PY  - 1941
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 639
DO  - 10.6028/NBS.LCIRC.639
ER  -