At: American Journal of Botany, 22, 3 By: Bancroft H. H.
journalAt: Annals of Botany, 46, 84 By: Bancroft H. H.
journalAt: Palaeontographica, Abtheilung, B, Paläophytologie, 245, 1-6 By: Awasthi N., Mehrotra R. C.
journalAt: Chishitsugaku zasshi, 50, 602 By: Huzioka K.
journalAt: Himalayan geology, 21, 1-2 By: Guleria J. S., Srivastava R.
journalAt: Scientific papers / Division of the Illinois State Museum, 1 By: Janssen R. E.
journalAt: Bulletin of the Wisconsin Natural History Society, New Series, 6, 1-2 By: Penhallow D. P.
journalAt: Philosophical transactions of the Royal Society of London, Series, B, containing papers of a biological character (later Biological sciences), 1931, 219, 464 By: Lang W. H., Cookson I. C.
journalAt: Contributions from the Museum of Paleontology, University of Michigan, 5, 4 By: Arnold C. A.
journalAt: Proceedings of the Section of Science / Koninklijke Akademie van Wetenschappen te Amsterdam, 31, 9 By: Pfeiffer J. P., van Heurn F. C.