TY  - RPRT
TI  - Spectral reflectance 
AU  - Weidner, Victor R
AU  - Hsia, Jack J
PY  - 1987
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS SP 250-8
DO  - 10.6028/NBS.SP.250-8
ER  -