TY - RPRT TI - 0 : 45 surface color AU - Nadal, Maria E AU - Early, Edward A AU - Bousquet, Robert R PY - 2008 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 250-71 DO - 10.6028/NIST.SP.250-71 ER -