To approve "The covenant to establish a commonwealth of the Northern Mariana Islands," and for other purposes: hearing before the Subcommittee on Territorial and Insular Affairs of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-fourth Congress, first session on H.J. Res. 549, H.J. Res. 550, and H.J. Res. 547 ... hearing held in Washington, D.C., July 14, 1975