Maryland senatorial election of 1950 : hearings before the Subcommittee on Privileges and Elections of the Committee on Rules and Administration, United States Senate, Eighty-second Congress, first session, pursuant to S. Res. 250 (81st Congress, 2nd session) relative to the duties imposed upon the Committee by subsection (O) (1) (D) of Rule XXV of the standing rules of the Senate on senatorial campaign expenditures.