- CHAPTER II: Mexican Mythology: Nahua Religion
- Other Ancient Astronomy Citat: "...Celestial objects that were observed were Tōnatiuh (Sun), Mētztli (Moon), solar and lunar eclipses, Tiyānquiztli (Pleiades), Citlālpōl (Venus), Citlālin popōca (comet), Citāltamina (meteors), Xonecuilli (Little Dipper), and several objects which are not currently confirmed. Those falling into this last category include Mamalhuāztli, the Fire Drill (Orion?), Cītlaltlachtli (Gemini?), and Cītlalcolōtl (Scorpio)..."