| http://www.w3.org/ns/prov#value | - A textbook is any book or a book substitute, including hard-covered or paperback books, workbooks designed to be written in and used up, certain newspapers and news magazines and manuals which a pupil is required to use as a text or a text-substitute in a particular class or program as a primary source of study material intended to implement a major part of a State or local curriculum.
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