April 11, 1961
Romanian Scientists
Complete Set of 4 nos of commemorative postage stamps on the Romanian Scientists : Issued by Romania Issued on Apr 11, 1961 Issued for : Some of the Great Scientists of Romania. Picture : 10 b – Peter Poni and Chemical Apparatus, 20 b – A. Saligny and Danube bridge, Cernavoda, 55 b – C. Budeanu and electrical
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