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Evon, D., Kasprak, A. (2015) ‘Does a Single Volcanic Eruption Release as Much CO2 As All of Humanity Has to Date?’, Snopes.com, 16 December. Available at http://www.snopes.com/volcano-carbon-emissions/ (Accessed 9 July 2020).
Levenson, R.M., Krupinski, E.A., Navarro, V.M., Wasserman, E.A. (2015 ‘Pigeons (Columba livia) as Trainable Observers of Pathology and Radiology Breast Cancer Images' Plos.org, 18 November, Available at http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0141357 (Accessed 10 January 2020).
Pigeons (Columba livia) as Trainable Observers of Pathology and Radiology Breast Cancer Images (14 November 2015) YouTube video, added by Navarro, V. [Online]. Available at https://www.youtube.com/watch?v=flzGjnJLyS0#t=24 (Accessed 10 January 2020).