HOOVER'S WATER SUPPLY AND TREATMENT

DJ : Short for dust jacket, a protective and often decorative wrapper, usually made of paper which wraps around the binding of a book.

crisp : A term often used to indicate a book's new-like condition. Indicates that the hinges are not loosened. A book described as crisp will not have 'well-read' pages, i.e., where the book will naturally open to certain pages or sections.