Acta Agrestia Sinica
Observation on the Pollen Morphology of Several Principal Species of the Steppe Vegetation in the Desert Area of the Helan Mountains
WAN Tao, YAN Ling, LIHong, YIWei-dong
. 2004, (3): 231 -235 .  DOI: 10.11733/j.issn.1007-0435.2004.03.014