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VEGETATION IN THE LUANHE RIVER BASIN AND SURROUNDING AREAS Quantitative Relationship Between Pollen in the Surface Soil and Vegetation in the Yanshan Area ADVANCES IN STUDIES ON RELATIONSHIP AMONG POLLEN, VEGETATION AND CLIMATE Surface pollen research of Nanshan region, Shihezi City in Xinjiang Climatic Response Surface from Pollen Data for Four Arboreal Taxa in North China Study on Surface Pollen in Middle Inner Mongolia, China Numerical Characteristics of Pollen Assemblages of Surface Samples from the West Kunlun Mountains