Article PDF
Rights and permissions
About this article
Cite this article
Notes (Reprinted from Nature, June 16, 1870). Nature 224, 452 (1969). https://doi.org/10.1038/224452a0
Issue Date:
DOI: https://doi.org/10.1038/224452a0
Nature volume 224, page 452 (1969)
Notes (Reprinted from Nature, June 16, 1870). Nature 224, 452 (1969). https://doi.org/10.1038/224452a0
Issue Date:
DOI: https://doi.org/10.1038/224452a0