Hicks, Clifford B. <br/><br/>
Alvin's secret code / 
By Clifford B. Hicks ; Cover design by Constance Ftera. 
 - [1st ed.] 
 - New York ;  Toronto :  Scholastic Book Services,  [1963]. 
 - 160 p. :  illus. ;  22 cm. 
<br/><br/> 5th printing 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ciphers--Fiction.<br/>Buried treasure--Fiction.<br/>Mystery and detective stories.