Recommended Citation
Postprint version. Published in Nature, Volume 330, November 19, 1987, pages 208-208.
NOTE: At the time of publication, the author Richard B. Frankel was not yet affiliated with Cal Poly.
The definitive version is available at https://doi.org/10.1038/330208a0.
Disciplines
Physics
Copyright
1987 Nature Publishing Group.
URL: https://digitalcommons.calpoly.edu/phy_fac/264
