Keene, Carolyn. <br/><br/>
The message in the hollow oak. 

 - New York,  Grosset & Dunlap  [1972] 
 - 181 p.  illus.  20 cm. 
 - Her Nancy Drew mystery stories, 12 .
<br/><br/> Nancy Drew tackles a mystery professional detectives failed to solve--finding a valuable centuries-old message in a hollow oak tree in Illinois. 
<br/><br/><label>ISBN: </label>0448095122 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mystery and detective stories.
<br/><br/><label>Dewey Class. No.: </label>F KEE