by Gustaf T. Troedsson ; with an appendix, Report on a collection of Graptolites from the Charchaq series of Chinese Turkistan by O.M.B. Bulman

Bokförlags aktiebolaget Thule 1937 Reports from the Scientific Expedition to the North-Western Provinces of China under the leadership of Dr. Sven Hedin : the Sino-Swedish Expedition publication 4 ; V ; Invertebrate palæontology ; 1

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