@book{119227,
	author = {Lancaster, F. Wilfrid},
	title = { information-retrieval systems: characteristics, testing and evaluation},
	publisher = {John Wiley & sons,},
	year = {1968.},
	address = {New York :},
	note = {Translation of Avtomatizirovannye informat︠s︡ionno-poiskovye sistemy.}
}