De Camp, L. Sprague <br/><br/>
Ancient engineers   
by L. Sprague de Camp 
 - New York  Ballantine Books  1963 
 - ix, 450p. 
<br/><br/><label>ISBN: </label>0345320298 
<br/><br/><label>Dewey Class. No.: </label>620.0092  / N63