An Essay Concerning Human Understanding Web Links

“Locke, Berkeley, & Empiricism,” Crash Course Philosophy

https://www.youtube.com/watch?v=5C-s4JrymKM

“Locke: Knowledge of the External World,” Matthew Priselac

http://www.iep.utm.edu/locke-kn/

“John Locke,” William Uzgalis

https://plato.stanford.edu/entries/locke/