In the course of the past two years,when they were in the field with theThird American (1930) and the Haardt-Citroen (1931) Central Asiatic Expedi-tions,the authors of the present note had opportunities for making a series ofarchaeological observations ov
P. TEILHARD DE CHARDIN C. C YOUNG.1933. ON SOME NEOLITHIC (AND POSSIBLY PALAEOLITHIC) FINDS IN MONGOLIA, SINKIANG AND WEST CHINA[J]. Acta Geologica Sinica(),12(0):
