Maryland senatorial election of 1950, hearings before subcommittee on privileges and elections, 82d Congress, 1st session, pursuant to S. Res. 250 (81st Cong.), relative to duties imposed upon committee by subsec. (o) (1) (D) of Rule 25 of Standing rules of Senate on senatorial campaign expenditures, Feb. 20-Apr. 11, 1951.