Article PDF
Rights and permissions
About this article
Cite this article
Prof. J. F. Spencer. Nature 167, 135 (1951). https://doi.org/10.1038/167135a0
Issue Date:
DOI: https://doi.org/10.1038/167135a0
Nature volume 167, page 135 (1951)
Prof. J. F. Spencer. Nature 167, 135 (1951). https://doi.org/10.1038/167135a0
Issue Date:
DOI: https://doi.org/10.1038/167135a0