National health insurance proposals. Part 5, November 1, 1971 : hearings before the Committee on Ways and Means, House of Representatives, Ninety-second Congress, first session on the subject of national health insurance proposals, October 19, 20, 26, 27, 28, 29; November 1, 2, 3, 4, 5, 8, 9, 10, 11, 12, 15, 16, 17, 18 and 19, 1971