Roof Shale Flora of Coal Seam 6 from the Asselian (Lower Permian)Taiyuan Formation of the Wuda Coalfield, Inner Mongolia and Its Ecostratigraphic Significance
Roof Shale Flora of Coal Seam 6 from the Asselian (Lower Permian)Taiyuan Formation of the Wuda Coalfield, Inner Mongolia and Its Ecostratigraphic Significance