Urry, John. Reference groups and the theory of revolution. - London, Boston, Routledge & K. Paul [1973] - xii, 244 p. 22 cm. - International library of sociology . ISBN: 0710075413 Subjects--Topical Terms: Revolutions.Reference groups.Radicalism--Indonesia. Dewey Class. No.: 301.6333 / URR N73R