TY  - RPRT
TI  - Supplement to national directory of commodity specifications/ 
AU  - Thompson, G N
AU  - Cooley, Paul A
PY  - 1947
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NBS MP 178-2
DO  - 10.6028/NBS.MP.178-2
ER  -