@book{19793,
	author = {Kullrich, Ernst and M�uller, Heinrich},
	title = {Lehr- und �Ubungsbuch der Geometrie :},
	publisher = {Teubner},
	year = {1933},
	series = {H. M�ullers Mathematisches Unterrichtswerk},
	address = {Leipzig ;Berlin},
	edition = {10. Aufl.}
}