Rogers, Everett M. <br/><br/>
Communication of Innovations  : A croos-cultural approach 
Everett M. Rogers with F. Floyd Shoemaker 
 - 2nd ed. 
 - New York  MacMillan  1971 
 - 476 p.  24 cm 
<br/><br/><label>Subjects--Index Terms: </label>Sociologia