Browsing Vol. 34 Núm. 1-2 (2020) by Subject "Rayos X"

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    • El Dr. Carvallo, Ricardo Palma y los rayos X 

      Rabinovich, Daniel (Pontificia Universidad Católica del PerúPE, 2020-09-14)
      The discovery of X-rays by Wilhelm Conrad Röntgen and their introduction in Peru by Dr. Carvallo is the central theme of the philatelic corner.