TY  - RPRT
TI  - NBS standard reference materials catalog 1988-89 
AU  - Seward, R W
PY  - 1988
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS SP 260e1988
DO  - 10.6028/NBS.SP.260e1988
ER  -