@book{55677,
	author = {K�ugler, Frank. and ebrary, Inc.},
	title = {Variation and gradience in phonetics and phonology},
	publisher = {Mouton de Gruyter,},
	year = {2009.},
	series = {Phonology & phonetics ;},
	address = {New York, NY :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10329853}
}