Dobkin de Rios Marlene. The Influence of Psychotropic Flora and Fauna on Maya Religion // Current Anthropology15 (June 1974). P. 150–151; Pasztory Esther. The Iconography of the Teotihuacan Tlaloc // Studies in Pre-Columbian Art and Archaeology. No. 15 (1974). P. 7, 10.