This bibliography lists the most important works in political science published in 1990. First published in 1952, the four International Bibliogrpahies of the Social Sciences (Anthropology, Economics, Political Science and Sociology) are at the forefront of social science information publishing. The IBSS is now produced under the editorial direction and authority of the British Library of POlitical and Economic Science at the London School of Economics, one of the world’s leading social science institutions. In 1990 this database was merged with the London Bibliography of the Social Sciences to provide an unparalleled information service of bibliographic data covering the world’s literature in the social sciences. The IBSS is the essential tool for librarians, university departments, research institutes, and all public or private institutions whose work requires access to up-to-date and comprehensive knowledge of the social sciences.