Wave Propagation and Group Velocity
By Léon Brillouin. (Pure and Applied Physics: a Series of Monographs, Vol. 8.) Pp. xi + 154. (New York: Academic Press, Inc.; London: Academic Press, Inc. (London), Ltd., 1960.) 6 dollars.
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PRYCE, M. Wave Propagation and Group Velocity. Nature 191, 104 (1961). https://doi.org/10.1038/191104a0
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DOI: https://doi.org/10.1038/191104a0