Neutral value scales. I. Munsell neutral value scale Munsell, A. E. O. ; Sloan, L. L. ; Godlove, I. H. Abstract Publication: Journal of the Optical Society of America (1917-1983) Pub Date: November 1933 DOI: 10.1364/JOSA.23.000394 Bibcode: 1933JOSA...23..394M