As quoted in American Journal of Physics, Vol. 14 | (1946), p. 248
Frederick Soddy: Citáty v angličtine
As quoted in Morning of the Magicians (1963) by Louis Pauwels and Jacques Berger, p. 181
Frederick Soddy's speech at the Nobel Banquet in Stockholm (10 December 1922) http://nobelprize.org/nobel_prizes/chemistry/laureates/1921/soddy-speech.html