TY  - RPRT
TI  - Technical activities 1979 
AU  - Hoffman, John D
AU  - Wachtman, John B
PY  - 1980
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 80-1996
DO  - 10.6028/NBS.IR.80-1996
ER  -