Those inventive Americans / 
Produced by the National Geographic Special Publications Division ; Editor-in-chief: Melville Bell Grosvenor ; Foreword by Leonard Carmichael. 
 - Washington :  National Geographic Society,  1971. 
 - 231 p.  ill.,(part col.), ports. (part col.) ;  27 cm. 
 - National geographic special publications .
<br/><br/><label>ISBN: </label>0870440896 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventors--United States.