High cost of gasoline and other petroleum products : hearings before a subcommittee of the Committee on Manufactures, United States, Sixty-seventh Congress, second and fourth sessions, pursuant to S. Res. 295 amending S. Res. 292, directing the Committee on Manufactures to investigate and report to the Senate the conditions of the crude oil and gasoline markets during the years 1920, 1921, and to date in 1922, agreed to April 20 (calendar day, May 13), 1922