On the theory and measurement of technological change.  

 - Cambridge,  Cambridge U.P.  1966.  
 - xii, 214 p  tables, diagrs  23 cm. 
<br/><br/>Bibliographical footnotes.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic development--Mathematical models.<br/>Technology--History.
<br/><br/><label>LC Class. No.: </label>HB199  / .B73