Article PDF
Rights and permissions
About this article
Cite this article
Royal Society : Foreign Members. Nature 190, 488 (1961). https://doi.org/10.1038/190488a0
Issue Date:
DOI: https://doi.org/10.1038/190488a0
Nature volume 190, page 488 (1961)
Royal Society : Foreign Members. Nature 190, 488 (1961). https://doi.org/10.1038/190488a0
Issue Date:
DOI: https://doi.org/10.1038/190488a0