Engel, Leonard <br/><br/>
New Worlds Modern Science 

 - New York  Dell Publishing Co.  1956 
 - 383p 
<br/><br/> includes index and biblioraphy 
<br/><br/><label>ISBN: </label> 0 
<br/><br/><label>Dewey Class. No.: </label>Q03  / EN321