Pratt, Julius W. A history of United States foreign policy / Julius W. Pratt, Vincent P. de Sartis. - 4th ed. / . - London : Prentice Hall , 1980. - xvi,553p : ill.,charts ; 25cm . NULL ISBN: 0133922820 NULL Subjects--Index Terms: FOREIGN RELATIONS Dewey Class. No.: 327.73 / PRA/H