pdf Le Pennec, J. -L., Jaya, D., Samaniego, P., Ramón, P., Moreno Yánez, S., Egred, J., & van der Plicht, J. (2008) Popular

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The AD 1300–1700 eruptive periods at Tungurahua volcano, Ecuador, revealed by historical narratives, stratigraphy and radiocarbon dating. Journal of Volcanology and Geothermal Research, 176(1), 70-81.

https://doi.org/10.1016/j.jvolgeores.2008.05.019