Dr. Hilary Koprowski (R) and an assistant working Dr. Casimer Funk in His Laboratory Polish-born engineer Stefan Kudelski and the famous Nagra 5N recorder he started developing for the US White House in 1960. (Photo by Jean-Pierre Fizet/Sygma/Sygma via Getty Images) 15 stycznia 2021 16Odsłon 0Lajków Weronika Misiuk [etykiety-publikacji]