Article PDF
Rights and permissions
About this article
Cite this article
L'Illustrazione Scientifica . Nature 165, 552 (1950). https://doi.org/10.1038/165552c0
Issue Date:
DOI: https://doi.org/10.1038/165552c0
Nature volume 165, page 552 (1950)
L'Illustrazione Scientifica . Nature 165, 552 (1950). https://doi.org/10.1038/165552c0
Issue Date:
DOI: https://doi.org/10.1038/165552c0