Jordan, Winthrop D. The United States : conquering a continent, vo. 1 / Winthrop D. Jordan, Leon F. Litwack. - 7th ed. - N. J. : Prentice Hall, c1991. - xiv, 444p. : col. ill. ; 27 cm Contents : v.1. Conqueringa continent. v.2. Becoming a world power. Includes bibliographical references and index. ISBN: 0139335161 (v. 1) Subjects--Geographic Terms: United States--History LC Class. No.: E178.1 / J76 1991 v.1