Concerning land titles of the five civilized tribes of Oklahoma : hearings before the Committee on Indian affairs, House of representatives, Seventy-ninth Congress, first session, on H.R. 1200, H.R. 1197, and H.R. 1199, bills to validate titles to certain lands conveyed by Indians of the five civilized tribes and to amend the act entitled "An act relative to restrictions applicable to Indians of the five civilized tribes of Oklahoma," approved January 27, 1933, and to validate state court judgments in Oklahoma and judgments of the United States district courts of the state of Oklahoma