@book{109282,
	author = {Hendriks, Henri�ette, and ebrary, Inc.},
	title = {The structure of learner varieties},
	publisher = {Mouton de Gruyter,},
	year = {c2005.},
	series = {Studies on language acquisition ;},
	address = {Berlin ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10597541}
}