Spock, Leslie Erskine, 1900-Central Asiatic Expeditions (1921-1930)2005-10-062005-10-061929http://hdl.handle.net/2246/40638 p. : ill. ; 23 cm.Includes bibliographical references.2060245 bytesapplication/pdfen-USQL1 .A436 no.394, 1929Formations (Geology) -- China -- Inner Mongolia.Formations (Geology) -- Gobi Desert (Mongolia and China)Geology, Stratigraphic -- Pliocene -- China -- Inner Mongolia.Geology, Stratigraphic -- Pliocene -- Gobi Desert (Mongolia and China)Geology -- China -- Inner Mongolia.Geology -- Gobi Desert (Mongolia and China)text