"Inventor of the Week: Archive." Inventor of the Week: Archive. Lemelon-mit, n.d. Web. 17 Nov. 2012. <http://web.mit.edu/invent/iow/geiger.html>."Hans Geiger." Hans Geiger. NNDB, n.d. Web. 17 Nov. 2012. <http://www.nndb.com/people/123/000099823/>.
"Inventor of the Week: Archive." Inventor of the Week: Archive. Lemelon-mit, n.d. Web. 17 Nov. 2012. <http://web.mit.edu/invent/iow/geiger.html>.
"World Biography." Hans Geiger Biography. Encyclopedia of World Biography, n.d. Web. 17 Nov. 2012. <http://www.notablebiographies.com/Fi-Gi/Geiger-Hans.html>."Hans Geiger." Encyclopedia of World Biography. 2004. Retrieved November 20, 2012 from Encyclopedia.com:http://www.encyclopedia.com/doc/1G2-3404702419.html
"Hughes Medal." The Royal Society: Welcome. N.p., n.d. Web. 25 Nov. 2012. <http://royalsociety.org/awards/hughes-medal/>.
"Inventor of the Week: Archive." Inventor of the Week: Archive. Lemelon-mit, n.d. Web. 17 Nov. 2012. <http://web.mit.edu/invent/iow/geiger.html>.
"World Biography." Hans Geiger Biography. Encyclopedia of World Biography, n.d. Web. 17 Nov. 2012. <http://www.notablebiographies.com/Fi-Gi/Geiger-Hans.html>."Hans Geiger." Encyclopedia of World Biography. 2004. Retrieved November 20, 2012 from Encyclopedia.com:http://www.encyclopedia.com/doc/1G2-3404702419.html
"Hughes Medal." The Royal Society: Welcome. N.p., n.d. Web. 25 Nov. 2012. <http://royalsociety.org/awards/hughes-medal/>.