Kettunen, Harri; Christophe Helmke (2005). Introduction to Maya Hieroglyphs(PDF). Wayeb and Leiden University. p. 32. Archived from the original on 17 June 2007. Retrieved 2022-11-13.
Kettunen, Harri; Christophe Helmke (2005). Introduction to Maya Hieroglyphs(PDF). Wayeb and Leiden University. p. 16. Archived from the original on 17 June 2007. Retrieved 2022-11-13.
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Kettunen, Harri; Christophe Helmke (2005). Introduction to Maya Hieroglyphs(PDF). Wayeb and Leiden University. p. 32. Archived from the original on 17 June 2007. Retrieved 2022-11-13.
Kettunen, Harri; Christophe Helmke (2005). Introduction to Maya Hieroglyphs(PDF). Wayeb and Leiden University. p. 16. Archived from the original on 17 June 2007. Retrieved 2022-11-13.