http://www.aip.org/history/electron/jjhome.htm
http://www.nobel.se/physics/laureates/1906/thomson-bio.htlm
http://www/iop.org/Physics/Electron/Exhibition/section2/recording.html
http://www.chemcases.com/nuclear/nc-01.htm
http://gk12.rice.edu/trs/science/Atom/about.htm#dis
http://www.infoplease.com/ipa/A0905226.html
http://www.geocities.com/CapeCanaveral/Hangar/7244/homework/subatom/subatomic.html
http://www.howstuffworks.com/atom6.htm