How are books categorized in many larger libraries? English Grammar Q?

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Books in many larger libraries are categorized according to the, A. library of congress classification B. Humanities Index

May 6th, 2015

Books in many larger libraries are categorized according to the library of congress classification.

The answer is A

May 6th, 2015

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May 6th, 2015

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May 6th, 2015

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May 6th, 2015

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