@book{123116,
	author = {Berkeley, George and Warnock, G. J.},
	title = {The principles of human knowledge and Three dialogues between Hylas and Philonous /},
	publisher = {Collins,},
	year = {1962},
	series = {The Fontana library},
	address = {London :},
	note = {The first essay was originally published under title: A treatise concerning the principles of human knowledge.}
}