Mosca, Gaetano <br/><br/>
The Ruling class :  (Elementi di scienza politica) / 
Gaetano Mosca. Ed.and rev., with an introd. by Arthur Livingston 
 - 4. print 
 - New York [u.a.] :  McGraw-Hill,  1967 
 - XLI, 514 S. 
 - McGraw-Hill Paperbacks .