Mail matter. Declaring certain papers, pamphlets, books, pictures, and writings nonmailable, hearings before subcommittee, 78th Congress, 1st 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 penalty for mailing same, and for other purposes, Nov. 15 and 16, 1943.