Acquisition of control of air carriers : hearings before the Subcommittee on Transportation and Aeronautics of the Committee on Interstate and Foreign Commerce, House of Representatives, Ninety-first Congress, first session on H.R. 8261, a bill to amend the Federal Aviation Act of 1958, as amended, and for other purposes : H.R. 8322, a bill to amend the Federal Aviation Act of 1958 to make it unlawful for any person not an air carrier to acquire control of an air carrier unless the Civil Aeronautics Board determines that such person is engaged primarily in the business of transportation or a related business : H.R. 8323, a bill to amend the Federal Aviation Act of 1958 to make it unlawful for any person to acquire control of an air carrier without the approval of the Civil Aeronautics Board, and for other purposes, March 25 and 27, 1969.