Substitution of other materials for strategic metals used in minor coinage : hearings before the Committee on Banking and Currency, United States Senate, Seventy-seventh Congress, second session, on S. 2889, a bill to further the war effort by authorizing the substitution of other materials for strategic metals used in minor coinage, to authorize the forming of worn and uncurrent standard silver dollars into bars, and for other purposes. November 17 and 18, 1942