@book{26740,
	author = {Sefve, Ivar,},
	title = {Die Hipparionen Nord-Chinas,},
	publisher = {Published by the Geological survey of China,},
	year = {1927.},
	series = {China. Geological survey. Palæontologia sinica, ser. c, vol. IV, fasc. 2},
	address = {Peking,}
}