Amending the Oil and gas leasing act of 1920. Hearings before the Committee on the public lands, House of representatives, Seventy-fourth Congress, first session, on H.R. 5530 (H.R. 8289), a bill to amend an act entitled "An act to promote the mining of coal, phosphate, oil, oil shale, gas, and sodium on the public domain" approved February 25, 1920 (41 Stat. 437; U.S.C., title 30, secs. 185, 221, 223, and 226), as amended. April 15, 16, 17, 18, 19, 20, 22, and 23, 1935