At: Jahrbuch des Staatlichen Museums für Mineralogie und Geologie zu Dresden, 1955, 2 By: Krutzsch W.
journalAt: Plant Systematics and Evolution, 260, 2 By: Friis E. M., Pedersen K. R., Schönenberger J.
journalAt: Acta Biologica (Szeged), 17, 1–4 By: Kedves M., Hegedűs M., Bohony E.
journalAt: Geoscience and Man, 7 By: Nichols D. J.
bookAt: N. Amer. Geol. Palaeont., Cincinnati, Ohio, Western Methodist book concern By: Miller S. A.
bookAt: N. Amer. Geol. Palaeont., Cincinnati, Ohio, Western Methodist book concern, Appendix I By: Miller S. A.
bookAt: N. Amer. Geol. Palaeont., Cincinnati, Ohio, Western Methodist book concern, Appendix II By: Miller S. A.
journalAt: Professional Papers / United States Geological Survey, 294, A By: Peck R. E.
bookAt: Geobotany Conf., New York-London, Plenum Press By: Conkin J. E., Conkin B. M.
journalAt: Micropaleontology, 19, 1 By: Bergad R. D.