Roskin, Michael. Political science An Introduction / [Book :] Michael Roskin, Robert L. Cord, James A. Medeiros, Walter S. Jones. - 6th ed. - London : prentic hall international , 1997. - xi; 404; p : ill ; 23cm. Includes Index. All age. ISBN: 0136066747 Dewey Class. No.: 320 National Library of Medicine Call No.: 320 / R.P