Spanish Carl Gunnar Engström Cited by user Senda1234 on 09 Aug 2023 Carl Gunnar David Engström (1 de septiembre de 1912 - 9 de enero de 1987) fue un médico e innovador sueco.
German Wilhelm Conrad Röntgen Cited by user Schotterebene on 11 Feb 2023 Wilhelm Conrad Röntgen (* 27. März 1845 in Lennep, heute Stadtbezirk von Remscheid; † 10.
English Chlorine Cited by user Citation bot on 03 Jun 2020 Chlorine is a chemical element with the symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic…