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A revision of the fossil ferns from the Potomac group which have been referred to the genera <I>Cladophlebis</I> and <I>Thyrsopteris</I>
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A revision of the fossil ferns from the Potomac group which have been referred to the genera Cladophlebis and Thyrsopteris
Date:
1911
Citation:
Berry, Edward Wilber. 1911. "A revision of the fossil ferns from the Potomac group which have been referred to the genera Cladophlebis and Thyrsopteris." Proceedings of the United States National Museum, 41, (1862) 307–332. https://doi.org/10.5479/si.00963801.41-1862.307.
