Night Work in the Postal Service. Extracts from Hearings on H.R. 3840, also H.R. 5697, H.R. 8117, and H.R. 9004. Statements of Thomas F. Flaherty, W. M. Collins, H. W. Strickland, Harry C. Weinstock, John J. Gorman, Mary V. Halas, John D. Murphy, John M. Torka, John H. Bartlett, and William R. Spilman [electronic resource]