The secret of the caves /
by Franklin W. Dixon.
- New York : Grosset & Dunlap, c1992, c1964.
- 175 p. : ill.
- Hardy boys mystery stories,7. .
- Dixon, Franklin W. Hardy boys mystery stories ; 7. .
0448089078 0448189070 0448089076 (hardbound)
Hardy Boys (Fictitious characters)--Fiction. Spies--Fiction. Mystery and detective stories.