TY  - RPRT
TI  - Circular of the Bureau of Standards no. 424: washing, cleaning, and polishing materials
AU  - Smither, F W
PY  - 1939
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 424
DO  - 10.6028/NBS.CIRC.424
ER  -