TY  - RPRT
TI  - Standard Reference Materials : Didymium glass filters for calibrating the wavelength scale of spectrophotometers - SRM 2009, 2010, 2013, and 2014/
AU  - Eckerle, Kenneth L
AU  - Venable, Jr, William H
PY  - 1979
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NBS SP 260-66
DO  - 10.6028/NBS.SP.260-66
ER  -