Original: Investigation of Students for a Democratic Society, Part 3-A (George Washington University); Hearings Before the Committee on Internal Security, House of Representatives; 91st Congress, 2nd Session, July 22, 1969.
Simplified: Investigation of Students for a Democratic Society, Part 2 (Kent State University): Hearings Before the Committee on Internal Security, House of Representatives; 91st Congress, 2nd Session, June 24 and 25, 1969.