@book{20904,
	author = {IFIP TC-3 Working Conference on Computer Assisted Learning-Scope, Progress and Limits and Lewis, Robert, and International Federation for Information Processing.},
	title = {Computer assisted learning :},
	publisher = {North-Holland,},
	year = {1980},
	address = {Amsterdam :},
	note = {"Organised by Working Group 3.3 of IFIP Technical Committee 3, Educational, International Federation for Information Processing."}
}