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support AUTHOR INFORMATION CONSORTIA A CORRESPONDENT RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE A Correspondent. Physics: Chicago Tries Harder.
_Nature_ 230, 548–549 (1971). https://doi.org/10.1038/230548a0 Download citation * Issue Date: 30 April 1971 * DOI: https://doi.org/10.1038/230548a0 SHARE THIS ARTICLE Anyone you share the
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