Mowery, David C. <br/><br/>
Paths of innovation :  technological change in 20th-century America / 
David C. Mowery and Nathan Rosenberg 
 - Cambridge :  Cambridge University press,  1998       
 - x, 214 p. 
<br/><br/><label>ISBN: </label>0521646537 
<br/><br/><label>LC Class. No.: </label>T 21 M936p 1998