by D.M. Farquhar, G. Jarring and E. Norin. -- Sven Hedin Foundation, 1967. -- (Reports from the Scientific Expedition to the North-Western Provinces of China under the leadership of Dr. Sven Hedin : the Sino-Swedish Expedition ; publication 49 . I. Geography ; 3 . Sven Hedin Central Asia atlas : memoir on maps ; v. 2).