https://www.ducksters.com/history/africa/slavery_in_ancient_africa.php https://kids.britannica.com/students/article/Atlantic-slave-trade/602896
https://www.britannica.com/topic/transatlantic-slave-trade
https://www.dkfindout.com/uk/history/slave-trade/
https://www.bl.uk/learning/histcitizen/campaignforabolition/abolitionbackground/abolitionintro.html
https://www.rmg.co.uk/explore/how-did-slave-trade-end-britain
http://abolition.e2bn.org/campaign.html
http://www.discoveringbristol.org.uk/slavery/
http://understandingslavery.com/index.html
http://slaveryandremembrance.org/articles/article/?id=A0002
https://www.liverpoolmuseums.org.uk/transatlantic-slave-trade
https://www.britannica.com/biographies
https://www.famousscientists.org/
https://ideas.time.com/2013/12/10/whos-biggest-the-100-most-significant-figures-in-history/
https://www.bbc.co.uk/history/historic_figures/
https://www.thefamouspeople.com/historical-personalities.php
https://www.biographyonline.net/people/famous/historical-figures.html