title: Re: Color vision and the four-color-map problem, by Purves et al. (JOCN 12:2, 233-237, 2000).
authors.forename: E L
authors.initials: EL
authors.lastname: Schwartz
authors.forename: M
authors.initials: M
authors.lastname: Cohen
mesh_terms: D003118:Color Perception / Q000502:physiology*; D006801:Humans; D008954:Models, Biological