First Day Cover
首日封
Sobrescrito de 1.º Dia
SlovakiaInternational Year of Crystallography
Date of Issue : 14 February 2014
In 2014 we will celebrate 100 years since awarding the Nobel Price to Max von Laue for the experiments that for the first time revealed the atomic (crystal) structure of solid matter via X-ray diffraction. That is why the UNO announced the year 2014 to be the International Year of Crystallography.
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