At: Stratigraphy and Geological Correlation, 4, 6 By: Fotjanova L. I., Serova M. Ya., Levin F. D., Maslova N. P.
journalAt: Facies, 60, 2 By: Jarochowska E., Munnecke A.
journalAt: Palaeontographica, Abtheilung, B, Paläophytologie, 101, 5-6 By: Bhardwaj D. C.
journalAt: Australian journal of botany, Series, Supplementary series, 6 By: Martin H. A.
journalAt: Johns Hopkins University Studies in Geology, 12 By: Berry E. W.
journalAt: Bulletin of Geosciences, 85, 4 By: Popa M. E., Pšenička J.
journalAt: Botanical Gazette, 110, 1 By: Sahni B.
journalAt: Second Geological Survey of Pennsylvania Report of Progress, PP By: Fontaine W., White I. C.
bookAt: Compt. Rendu 4ème Congr. Stratigr. Géol. Carbonif. Heerlen, 1958, Maestricht, Ernest van Aelst, 2 By: Plumstead E. P.
journalAt: Transactions of the American Microscopical Society, 29 By: Bessey C. E.