Debate en torno a la etica del discurso de Apel

"Study of 'Maya blue' an intense sky-blue pigment used to decorate precolumbian pottery (especially but not exclusively Maya polychromes) and for precolumbian and early colonial period murals. Concludes that the pigment was produced by combining mineral pigments with indigo. Includes many color illustrations of ceramic vessels, figurines, and murals with Maya blue paint"--Handbook of Latin American Studies, v. 57.