400 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1964 



LITERATURE CITED 



Benedetti, S. de. 



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 Dingle, H. 



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 Mossbauer, R. L, 



1958. Kernresonauzfluoreszenz von Gammastrahlung in Ir^". Zeitschrift 



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 Pound, R. v., and Reblia, G. A. 



1960. Variation with temperature of the energy of recoil-free gamma rays 

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1959. Invisibility of the Lorentz contraction. Physical Review, vol. 116, 



No. 4, pp. 1041-1045. 

 Weisskopf , V. K. 



1960. The physical appearance of rapidly moving objects. Physics Today, 



vol. 13, No. 9, pp. 24-27. 



