Article PDF
Rights and permissions
About this article
Cite this article
The American Academy of Arts and Sciences. Nature 200, 940 (1963). https://doi.org/10.1038/200940a0
Issue Date:
DOI: https://doi.org/10.1038/200940a0
Nature volume 200, page 940 (1963)
The American Academy of Arts and Sciences. Nature 200, 940 (1963). https://doi.org/10.1038/200940a0
Issue Date:
DOI: https://doi.org/10.1038/200940a0