A new species of leafy calamite stem from the Pennsylvanian (Bolsovian) of the South Wales Coalfield
A new species of leafy calamite stem from the Pennsylvanian (Bolsovian) of the South Wales Coalfield
https://www.researchgate.net/publication/342554303_A_new_species_of_leafy_calamite_stem_from_the_Pennsylvanian_Bolsovian_of_the_South_Wales_Coalfield
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