Hearings Before a Special Committee Investigating Expenditures in Senatorial Primary and General Elections, United States Senate, Sixty-ninth Congress, First Session, [-Seventieth Congress, First Session] Pursuant to S. Res. 195, a Resolution Authorizing the President of the Senate to Appoint a Special Committee to Make Investigation Into the Means Used to Influence the Nomination of Any Person as a Candidate for Membership of the United States Senate