Article PDF
Rights and permissions
About this article
Cite this article
International Palæontological Union. Nature 180, 1452 (1957). https://doi.org/10.1038/1801452a0
Issue Date:
DOI: https://doi.org/10.1038/1801452a0
Nature volume 180, page 1452 (1957)
International Palæontological Union. Nature 180, 1452 (1957). https://doi.org/10.1038/1801452a0
Issue Date:
DOI: https://doi.org/10.1038/1801452a0