TY  - RPRT
TI  - Standard Reference Materials : SRM 1969 /
AU  - Mangum, B W
PY  - 1983
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NBS SP 260-87
DO  - 10.6028/NBS.SP.260-87
ER  -