@book{3713,
	author = {Bolton, Sibylle and Jenkins, Eva-Maria},
	title = {Probleme der Leistungsmessung},
	publisher = {Langenscheidt},
	year = {1996},
	series = {Fernstudienangebot. Germanistik. Deutsch als Fremdsprache},
	address = {Berlin etc.}
}