TY  - RPRT
TI  - Standard Reference Materials : Preparation and calibration of standards of spectral specular reflectance/
AU  - Hsia, J J
AU  - Richmond, J C
PY  - 1972
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NBS SP 260-38
DO  - 10.6028/NBS.SP.260-38
ER  -