At: Byulleten' nauchno-tekhnicheskoj informatsii Otdela nauchno-tekhnicheskoj informatsii Vsesoyuznogo nauchno-issledovatel'skogo instituta ekonomiki mineral'nogo syr'ya i geologorazvedochnykh rabot, Series, Geol. Mestorozhd. Polez. Iskop., Reg. Geol., 15 By: Gurevich K. Ya.
journalAt: Botanicheskii Zhurnal, 59, 8 By: Zhilin S. G.
bookAt: Petref. Germ., Düsseldorf, Arnz & Comp., 1, 1 By: Goldfuss G. A.
bookAt: Petref. Germ., Düsseldorf, Arnz & Comp., 1, 2 By: Goldfuss G. A.
bookAt: Petrif. Derb., Wigan, 1 By: Martyn W.
bookAt: Petrif. Derb., Wigan By: Martyn W.
journalAt: Contributions from the Museum of Paleontology, University of Michigan, 14, 10 By: Arnold C. A.
journalAt: Pan-American Geologist, 47, 2 By: Berry E. W.
journalAt: Acta Palaeobotanica, 28, 1-2 By: Suthar O. P., Bohra D. R., Sharma B. D.
journalAt: Palaeobotanist, 1972, 21, 3 By: Trivedi B. S., Verma C. L.