Text ( visual ) : unmediated The measurement of colour / W.D. Wright. -- 2nd ed. -- London : Hilger & Watts , 1958. -- ix, 263 p., 8 p. of plates : ill. (some col.) ; 23 cm. -- (BA22487219) ; https://ci.nii.ac.jp/ncid/BA22487219 Author Heading(s): Wright, W. D. (William David). -- Classification(s): LCC : QC495 ; DC : 535.6. -- Subject Heading(s): LCSH : Color ; LCSH : Colorimetry ; LCSH : Light