Papallo, George <br/><br/>
What makes it work 
George Papallo 
 - New York:  Arco,  1976. 
 -  143p. 
<br/><br/> PB 
<br/><br/><br/>Eng 
<br/><br/><label>ISBN: </label>0668039639 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology-Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>600  / PAW