@book{121909,
	author = {Fortescue, Michael D. and ebrary, Inc.},
	title = {A discourse production model for 'twenty questions'},
	publisher = {J. Benjamins,},
	year = {1980.},
	series = {Pragmatics & beyond ;},
	address = {Amsterdam :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10517166}
}