Third Annual Report Under the Bituminous Coal Act of 1937 Being a Full Report of the Activities of the National Bituminous Coal Commission for Fiscal Year Ended June 30, 1939, with Some Additional Activities of the Bituminous Coal Division, Department of the Interior. Letter from the Secretary of the Interior Transmitting the Third Annual Report Under the Bituminous Coal Act of 1937, Made Pursuant to the Provisions of Sections 2 (a) and 14 of the Bituminous Coal Act of 1937 (Public No. 48, 75th Congress, Approved April 26, 1937).