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John Locke, James Augustus St. John (1872). “Philosophical Works: Preliminary discourse by the editor. On the conduct of the understanding. An essay concerning human understanding”, p.128
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John Locke (1854). “Locke's essays. An essay concerning human understanding. And A treatise on the conduct of the understanding. With the author's last additions”, p.489
John Locke (1825). “An Essay Concerning Human Understanding: An analysis of Mr. Locke's Doctrine of ideas .... A defense of Mr. Locke's Opinion concerning personal identity .... A treatise on the conduct of the understanding. Some thoughts concerning reading and study for a gentleman. Elements of natural philosophy. A new method of a common place book. Extracted from the author's works. With a life of the author”