Postal Employees: Hearing Before the Committee on Post Offices and Post Roads, United States Senate, Seventy-fourth Congress, First Session, on H.R. 1993, an Act Giving Superintendents at Classified Post-office Stations Credit for Substitutes Serving Under Them; H.R. 5723, an Act to Give Certain Railway Postal Clerks the Same Time Credits for Promotion Purposes as Were Given Others who Were Promoted by July 1 when Automatic Promotions Were Restored; H.R. 6990, an Act to Fix the Hours of Duty of Postal Employees, and for Other Purposes; H.R. 7688, an Act to Provide for the Appointment and Promotion of Substitute Postal Employees, and for Other Purposes; and H.R. 7709, an Act to Provide Time Credits for Substitute Laborers in the Post Office when Appointed as Regular Laborers; June 21, 1935