Conan Doyle, Arthur. <br/><br/>
The sign of four / 
Arthur Conan Doyle. 
 - Heinemann International :  Oxford,  1992. 
 - 63 p. :  il. ;  21 cm 
<br/><br/><label>ISBN: </label>0435272411 
<br/><br/><label>Subjects--Index Terms: </label>Literatura juvenil Inglesa