TY  - RPRT
TI  - Standard Reference Materials : Sources of information/
AU  - Mears, Thomas W
AU  - Hague, John, L
PY  - 1965
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NBS SP 260-4
DO  - 10.6028/NBS.SP.260-4
ER  -