Inventors and inventions :  a supplement of childcraft the how and why library / 
World Book Inc. 
 - 224 pages :  illustrations ;  25 cm 
<br/><br/> Includes glossary and index 
<br/><br/>Includes bibliographical references 
<br/><br/> Primary 
<br/><br/><label>ISBN: </label>0716606933 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventors<br/>Inventions
<br/><br/><label>Dewey Class. No.: </label>609.2