Declaring certain papers, pamphlets, books, pictures, and writings nonmailable. [Part 1], November 15, 16, 1943 : hearings before a subcommittee of the Committee on the Post Office and Post Roads, House of Representatives, Seventy-eighth Congress, first session on H.R. 2328 and H.J. Res. 49, bills to amend Title 18, Criminal Code, to declare certain papers, books, pictures, and writings nonmailable, to provide a penalty for mailing same, and for other purposes