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- ISBN: 97804484898070 (hb.)
- Physical Description: 174 pages. : illustrations ; 20 cm.
- Publisher: New York, NY : Grosset & Dunlap, 1962.
|Summary, etc.:|| An anonymous diary is a mystery with handwriting that is difficult to decipher. It is filled with technical drawings and chemical formulas. Was the destructive explosion an accident or an act of revenge?
|Target Audience Note:|| 740 Lexile.
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|Subject:||Drew, Nancy (Fictitious character) > Juvenile fiction.
|Genre:||Detective and mystery fiction > Juvenile fiction.
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