References
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Shimakura, M. (1936): On the fossil wood of Torreya nucifera Sieb. et Zucc. from the Pleistocene of Kanagawaken, Japan. – The Journal of the Geological Society of Japan 43(512): 297–302 + pl. 17.
Graham, R. (1935): Pennsylvanian flora of Illinois as revealed in coal balls. II. – Botanical Gazette 97(1): 156–168.
Berry, E. W. (1935): A preliminary contribution to the floras of the Whitemud and Ravenscrag formations. – Memoir, Geological Survey, Canada 182: 1–107.
Miner, E. L. (1935): Paleobotanical examinations of Cretaceous and Tertiary coals. – The American Midland Naturalist 16(4): 585–625.
Graham, R. (1934): Pennsylvanian flora of Illinois as revealed in coal balls. I. – Botanical Gazette 95(3): 453–476.
Berry, E. W. (1930): Revision of the lower Eocene Wilcox flora of the Southeastern States. – Professional Papers, United States Geological Survey 156: 1–196, 50 pls.
Kryshtofovich, A. N. (1929): Otkrytie drevneyshikh dvudol'nykh pokrytosemennykh i ekvivalentov potomakskikh sloyev na Suchane v Ussuriyskom krae. – Izvestiya Geologicheskogo Komiteta 48(9): 1357–1390.
Rühle von Lilienstern, H. (1928): "Dioonites pennaeformis Schenk", eine fertile Cycadee aus der Lettenkohle. – Paläontologische Zeitschrift 10(1): 91–107.
Berry, E. W. (1925): A Miocene flora from Patagonia. – Johns Hopkins University Studies in Geology 6: 183–251.
Knowlton, F. H. (1924): Flora of the Animas Formation. – Professional Papers, United States Geological Survey 134: 71–117, XIX pls.
Berry, E. W. (1924): An Oligocene cashew nut from South America. – American Journal of Science, Ser. 5 8(44): 123–126.
Berry, E. W. (1924): The Middle and Upper Eocene floras of southeastern North America. – Professional Papers, United States Geological Survey 92: 1–199, LXV pls.
Knowlton, F. H. (1923): Fossil plants from the Tertiary lake beds of South-Сentral Colorado. – Professional Papers, United States Geological Survey 131(G): 183–197.
Kidston, R. (1923): Fossil plants of the Carboniferous rocks of Great Britain. – Memoirs of the Geological Survey of Great Britain, Palaeontology 2(4): 275–376 + pls 69–91.
Engelhardt, H. (1922): Die alttertiäre Flora von Messel bei Darmstadt. – Abhandlungen der Hessischen Geologischen Landesanstalt zu Darmstadt 7: 17–128, 40 pls.
Seward, A. C. (1919): Fossil Plants. A text-book for students of botany and geology. Volume IV: Ginkgoales, Coniferales, Gnetales. Cambridge University Press: xvi + 543 pp..
Arber, E. A. N. (1917): The earlier Mesozoic floras of New Zealand. – New Zealand Geological Survey, Paleontological Bulletin 6: 1–80 + 14 pls.
Halle, T. G. (1916): Lower Devonian plants from Röragen in Norway. – Kungliga Svenska Vetenskapsakademiens Handlingar 57(1): 1–46 + 4 pls.
Berry, E. W. (1916): The Lower Eocene floras of Southeastern North America. – Professional Papers, United States Geological Survey 91: 1–481.
Berry, E. W. (1916): A fossil nutmeg from the Tertiary of Texas. – American Journal of Science, Ser. 4 42: 241–245.