TY - RPRT TI - Collaborative reference program for color and appearance : ASTM 60° gloss Report no. 2 AU - Horlick, J AU - Cummings, T L PY - 1979 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 79-1371 DO - 10.6028/NBS.IR.79-1371 ER -