| 摘要 |
A system for correlating one or more books with other related information comprises at least one book cover having preaffixed or preprinted on its front or outer surface prominent indicia of the subject matter of the book, and, companion storage means, such as note books, file folders or other storage means, having the same prominent indicia preprinted or preaffixed on its front or outer surface so that subject identification and the correlation of the several elements is readily perceived.
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