American economic history - Harris, Seymour E.; Harris, Seymour E.; Ulman, Lloyd; Conrad, Alfred H.; Lincoln, G.A; Achinstein, Asher; Peck, Merton J.; Hoover, Edgar M.; North, Douglass C.; Smith, W.Y; Gurley, J.G; Gilboy, Elizabeth; et al. (McGraw-Hill, 1961)