Middle Jurassic Sporo-pollen Assemblage from the Yan'an Formation of Dongsheng, Nei Monggol, China
JIANG De-Xin and WANG Yong-Dong
Middle Jurassic Sporo-pollen Assemblage from the Yan'an Formation of Dongsheng, Nei Monggol, China
JIANG De-Xin and WANG Yong-Dong
J Integr Plant Biol . 2002, (2): 230 -238 .