Hughes, Thomas Parke. <br/><br/>
American genesis :  a century of invention and technological enthusiasm, 1870-1970 / 
Thomas P. Hughes. 
 - New York, N.Y., U.S.A. :  Penguin Books,  1990, c1989. 
 - xii, 529 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references (p. 473-513). 
<br/><br/><label>ISBN: </label>0140097414 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology--History.--United States
<br/><br/><label>LC Class. No.: </label>T21  / .H78 1990 
<br/><br/><label>Dewey Class. No.: </label>609.73