The Permian of Mongolia : a report on the Permian fauna of the Jisu Honguer limestone of Mongolia and its relations to the Permian of other parts of the world
Grabau, Amadeus W. (Amadeus William), 1870-1946; Berkey, Charles Peter, b. 1867; Morris, Frederick K. (Frederick Kuhne), b. 1886; Central Asiatic Expeditions (1921-1930)