An edition of Federal mine health and safety inspection amendments of 1949 (1949)

Federal mine health and safety inspection amendments of 1949.

Hearings before a special subcommittee of the Committee on Education and Labor, House of Representatives, Eighty-first Congress, first session, on H.R. 3023, a bill amending Public law 49, Seventy-seventh Congress, providing for the welfare of coal miners and for other purposes

By United States. Congress. House. Committee on Education and Labor