@book{55104,
	author = {Michels, Robert, and De Grazia, Alfred.},
	title = {First lectures in political sociology /},
	publisher = {University of Minnesota Press,},
	year = {1949.},
	address = {Minneapolis :},
	note = {Contains, with other papers, lectures delivered at the University of Rome and published in 1927 under title: Corso di sociologia politica.}
}