Politics and structure : essentials of American national government / Robert E. O'Connor, Thomas G. Ingersoll, Robert F. Pecorella. Politics & structure. O'Connor, Robert E. 1945- Ingersoll, Thomas G. Pecorella, Robert F., 1948- JK274 .O27 1990 320.973 20 OCP Ingersoll's name appears first on the 4th edition. Politics & structure. Includes bibliographies and index. Pacific Grove, Calif. : Brooks/Cole, c1990. c1990. 1990 Text xii, 238 p. : eng United States Politics and government.