TY  - RPRT
TI  - Standard Reference Materials : Standard samples issued in the USSR/
AU  - Freedman, A Y
AU  - Gorozhanina, R S
PY  - 1971
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NBS SP 260-30
DO  - 10.6028/NBS.SP.260-30
ER  -