You want a summary of the book?
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to establish setting and context</span>
Answer:schools needed to desegregate
Explanation:
In vertical files libraries store small printed material. They does not contain original documents or coprehensive information about particular subjects, it usually poses as photocopies, or papers with simple non essential information.
It won't be helpful for studying, but it can be a lot of fun, because you will never know what exactly you can find in there.
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