This free course was written by Shonil Bhagwat. It was first published in July 2019.
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Figure 1: Contains public sector information licensed under the Open Government Licence v3.0. (http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)
Figure 3 a & b: Julia Cooke
Figure 4: Ezonokuma. This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported https://creativecommons.org/licenses/by-sa/3.0/deed.en
Figure 5: Ranveig. This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported https://creativecommons.org/licenses/by-sa/3.0/deed.en
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