March 21, 1967, Letter from Dirksen to Thorpe DresserMarch 21, 1967Dirksen, Everett McKinleyhttps://creativecommons.org/publicdomain/mark/1.0/enghttp://congressarchives.org/record/EMD_Working_Papers-f347-1967_03_21Letter From Dirksen To Thorpe Dresser About His Suggestions And Comments Regarding The Civil Rights Act Of 1966.