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journalAt: Taxon, 44, 3 By: Feist M., Wang Z.
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journalAt: Bulletin / Department of Geology, Mines and Water Resources, Board of Natural Resources, State of Maryland, 27 By: Brenner G. J.
journalAt: Transactions and Proceedings of the Botanical Society of Edinburgh, 35, 3 By: Knox E. M.
bookAt: Compt. Rendu 3ème Congr. Stratigr. Géol. Carbonif. Heerlen, 1951, Maestricht, van Aelst, 1 By: Dijkstra S. J.
journalAt: Palaeontographica, Abtheilung, B, Paläophytologie, 197, 1-3 By: Knight J. A.
journalAt: American Midland Naturalist, 1951, 46, 3 By: Hoskins J. H., Cross A. T.
journalAt: Review of Palaeobotany and Palynology, 129, 4 By: Axsmith B. J., Andrews F. M., Fraser N. C.
journalAt: Kongliga Svenska Vetenskaps-Akademiens Handlingar, Series, Ny följd, Series 3, 12, 6 By: Halle T. G.