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According to Index to the Encyclopedia of Gun Control & Gun Rights this is found on page 459 to 480.
The title of the article is: Virginia Tech Tragedy: Analysis of the NICS Improvement Act of 2007.
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I am going to the library. I will have this information to you in about a half hour
It means someone else can help you. I'm really sorry. I tried. The library didn't have the right edition.