TY  - RPRT
TI  - Standard Reference Materials : SRM 1970 /
AU  - El-Sabban, Samir
AU  - Mangum, B W
PY  - 1986
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NBS SP 260-101
DO  - 10.6028/NBS.SP.260-101
ER  -