. . . "Rules"@en . . "Constitutional and Administrative Problems of Enforcing Internal Revenue Statutes hearings before the United States Senate Committee on the Judiciary, Subcommittee on Administrative Practice and Procedure, Ninetieth Congress, second session, on Jan. 17, 1968"@en . . . . "Considers procedures for verifying income tax returns and for enforcing internal revenue statutes."@en . . . . . . . . "Constitutional and Administrative Problems of Enforcing Internal Revenue Statutes : hearings before the United States Senate Committee on the Judiciary, Subcommittee on Administrative Practice and Procedure, Ninetieth Congress, second session, on Jan. 17, 1968"@en .