Books related to Political Science topics can generally be found under the following call #s:
J General legislative and executive papers
JA Political Science (General)
JF-JQ Political institutions and public administration
JK Political institutions and public administration (United States)
JS Local government. Municipal government
JX International law
JZ International relations
Remember you might have to look at other areas depending on your topic (example, if you topic is about education in this subject area then you might look in the education/teaching section).
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