Rights and permissions
About this article
Cite this article
S. Petterssen. Nature 253, 293 (1975). https://doi.org/10.1038/253293a0
Issue Date:
DOI: https://doi.org/10.1038/253293a0
S. Petterssen
Nature volume 253, page 293 (1975)
Nature volume 253, page 293 (1975)
S. Petterssen. Nature 253, 293 (1975). https://doi.org/10.1038/253293a0
Issue Date:
DOI: https://doi.org/10.1038/253293a0
