@book{189982,
	author = {Kippenhahn, Rudolf and Bu, Wei},
	title = {Da xiong xing zuo de mi mi : Tian kong he xing xing de gu shi = Secrets of the Ursa Major: Stories of the Sky and the Stars},
	publisher = {Science Popularization Press},
	year = {2013},
	series = {German Youth Science Classics Series},
	address = {Beijing}
}