@book{110258,
	author = {Hornberger, Nancy H. and ebrary, Inc.},
	title = {Bilingual education and language maintenance},
	publisher = {Foris Publications,},
	year = {1988.},
	address = {Dordrecht ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10599482}
}