@book{150,
	author = {Kaiser, Gabriele. and ebrary, Inc.},
	title = {International comparisons in mathematics education},
	publisher = {Falmer Press,},
	year = {1999.},
	series = {Studies in mathematics education series ;},
	address = {London ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=5003270}
}