English English Charles Richter English Charles Francis Richter Charles Richter English English Charles Francis Richter FULL ARTICLE AT WIKIPEDIA.ORG English Charles Richter Charles Richter Charles Francis Richter English Charles Richter English English English English Charles Francis Richter English English Charles Richter English Charles Francis Richter Charles Francis Richter Charles Richter English Charles Richter Charles Richter Charles Francis Richter Charles Richter FULL ARTICLE AT WIKIPEDIA.ORG English English Charles Richter English English English English English English English Charles Francis Richter English English Charles Richter English Charles Francis Richter Charles Francis Richter FULL ARTICLE AT WIKIPEDIA.ORG Charles Richter Charles Richter English Charles Richter Charles Francis Richter English English Charles Francis Richter Charles Richter English English