
https://bfpg.co.uk/wp-content/uploads/2020/05/Public-Opinion-on-Global-Britain-COVID-19-Sophia-Gaston-BFPG.pdf

http://wir2018.wid.world/files/download/wir2018-full-report-english.pdf

https://towardsdatascience.com/create-dumbbell-plots-to-visualize-group-differences-in-r-3536b7d0a19a