The Builders  marvels of engineering 
published by the Book Division, National Geographic Society. 
 - Washington, DC  The Society  c1992. 
 - 288 p.  ill. (some col.)  29 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0870448366 
<br/><br/><label>LCCN: </label>92030615  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering--History.
<br/><br/><label>LC Class. No.: </label>TA15  / .B85 1992 
<br/><br/><label>Dewey Class. No.: </label>620