TY  - RPRT
TI  - Letter Circular 868: detergents and detergent aids (superseding Letter Circular 338)
PY  - 1947
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 868
DO  - 10.6028/NBS.LCIRC.868
ER  -