1. Isotopes;Aston,1924
2. The development of mass spectrometry: An historical account;Beynon;International Journal of Mass Spectrometry and Ion Physics,1978
3. Measuring Mass: From Positive Rays to Proteins,2002
4. The Discharge of Electricity through Gases;Thomson,1898
5. Rays of Positive Electricity and their Application to Chemical Analyses;Thomson,1913