@book{119177,
	author = {Houghton, B. and Liverpool.},
	title = {Computer based information retrieval systems.},
	publisher = {Clive bingley, },
	year = {1968.},
	address = {London :},
	note = {Papers presented during the course of lectures on computer based information retrieval systems, at the Liverpool School of Librarianship Apr., 1968.}
}