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MLA Citation
Rebecca A. Koll et al.. “Reevaluation and taxonomic clarification of Gigantopteridium and Cathaysiopteris of western equatorial Pangea and their biogeographical significance.” Journal of paleontology, vol. 91, 2017, pp. 859–870. http://access.bl.uk/ark:/81055/vdc_100049407553.0x000048