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http://books.google.com/books?id=FbYL2VC7AFYC&pg=PA23&dq=ap+united+states+government+and+politics&hl=en&ei=OeWuTbnXGtOQ0QGMxtymCw&sa=X&oi=book_result&ct=result&resnum=3&ved=0CDsQ6AEwAjgK#v=onepage&q=ap%20united%20states%20government%20and%20politics&f=false
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