Regulating importation of petroleum and related products : hearings before the Committee on Ways and Means, House of Representatives, Seventy-first Congress, third session, on H.R. 16585, a bill to regulate commerce between the United States and foreign countries in crude petroleum and all products of petroleum, including fuel oil, and to limit the importation thereof, and for other purposes. Indexed. February 13, 14, 16 and 17, 1931