Notes
- 1959 . The End of American Innocence: A Study of the First Years of Our Own Time, 1912–1917 , Oxford and New York : OUP .
- Smith , Henry Nash . 1950 . Virgin Land: The American West as Symbol and Myth , Cambridge, MA : Harvard UP .
- Persico , Joseph E. 1997 . ‘Spy Versus Spy’ . New York Times Book Review , 28 Sept. : 15