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2. The Ferns (Filicales): The Eusporangiatae and Other Relatively Primitive Ferns (Vol. 2);Bower,1926
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4. A new fossil Gleicheniaceous fern from Illinois;Darrah;Harvard University Botanical Museum Leaflets,1938
5. A new gleicheniaceous fern Chansitheca (Sphenopteris) wudaensis from the lower Permian of Wuda, Nei Mongol, China;Deng;Acta Botanica Sinica,2000