'From 1937 to 1970 Charles Richter taught this science at Caltech'
seismology
E BEFORE I: From 1937 to 1970 Charles Richter taught this science at Caltech
From 1937 to 1970 Charles Richter taught this science at Caltech
From 1937 to 1970 Charles Richter taught this science at Caltech
E BEFORE I
seismology
E BEFORE I