click here to read about the history of the Munsell Chart

Munsell

http://www.gretagmacbeth.com/Source/Solutions/munsell/index.asp

http://www.coloracademy.co.uk/Subjects/Munsell/p2.htm

http://maya-archaeology.org/GretagMacbethMunsellcolorcharts/GretagMacbeth_Munsellcolors.htm