The Second Amendment states:
A well-regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed.
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Law books, including the , and other titles discussing legal topics in the United States, are located in the call number range beginning with the letters "KF." Books covering legal topics in Pennsylvania are shelved in the area beginning with the letters "KFP."
In addition to books about the Second Amendment located in the KF area, you'll also find materials about gun control shelved in the section starting with the letters "HV."