WANG Jian.Ration study on climatic changes in the north of China in the last 16 000 years[J].Scientia Geographica Sinica, 1989,3(3): 10 - 19.是什么意思_WANG Jian.Ration study on climatic changes in the north of China in the last 16 000 years[J].Scientia Geographica Sinica, 1989,3(3): 10