Zaltman, Gerald <br/><br/>
Processes and phenomena of social change 
by Gerald Zaltman... ( et. al. ) 
 - New York  John Wiley & Sons  1973 
 - 463 p. : ill. ; 23 cm. 
<br/><br/>p.419-449. 
<br/><br/><label>ISBN: </label>0471981303 
<br/><br/><label>LCCN: </label>72-013021 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social change<br/>Diffusion of innovations