Referensi:
1. Matton, G. et al. (2005). "The Richat Structure: A Geological Perspective." Journal of Geology.
2. NASA Earth Observatory. (2020). "Richat Structure: A Landmark Seen from Space."
3. National Geographic. (2019). "Exploring the Eye of the Sahara: Geological Insights."
4. Geological Society of America. (2008). "The Formation and Evolution of the Richat Structure."
5. International Union of Geological Sciences (IUGS). (2021). "100 Geological Heritage Sites of High Scientific Value."
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