Harmsworth's Wireless Encyclopedia /  
Harmsworth Encyclopedias. 
 - [S.l.] :   Harmsworth Encyclopedias,   [n.d.] 
 - v.  illus.  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias
<br/><br/><label>LC Class. No.: </label>AE