by N. Ambolt and E. Norin ; compiled by E. Norin. -- Sven Hedin Foundation, 1982. -- (Reports from the Scientific Expedition to the North-Western Provinces of China under the leadership of Dr. Sven Hedin : the Sino-Swedish Expedition ; publication 54 ; I ; Geography ; 5 . Sven Hedin Central Asia atlas : memoir on maps ; v. 3, fasc. 1).