Article PDF
Rights and permissions
About this article
Cite this article
American Academy of Arts and Sciences. Nature 173, 978 (1954). https://doi.org/10.1038/173978a0
Issue Date:
DOI: https://doi.org/10.1038/173978a0
Nature volume 173, page 978 (1954)
American Academy of Arts and Sciences. Nature 173, 978 (1954). https://doi.org/10.1038/173978a0
Issue Date:
DOI: https://doi.org/10.1038/173978a0