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In today's online world, do books still have a part to play? Absolutely!
Books can provide you with reliable information you can count on and include in your works cited/reference page. They often provide:
The Library of Congress classification for plastics is TP. More specifically, TP is broken down as follows:
Browsing in any of these areas may lead to the discovery of valuable material in addition to the specific items listed in this guide.
HD Economic History and Conditions
QD Chemistry
TA Engineering (General). Civil Engineering (General)