Unger, Irwin. These United States : the questions of our past / Irwin Unger. - Upper Saddle River, N.J. : Prentice Hall, c1999. - xvi, 832, A70 p. : ill., maps ; 23 cm. ISBN: 0130815519 Subjects--Topical Terms: United States -- History. Dewey Class. No.: 973 UNG