Urry, John. Reference groups and the theory of revolution / John Urry. - London : Routledge and Kegan Paul, 1973. - xii, 244 p. ; 22 cm. - International library of sociology / edited by John Rex . ISBN: 071008899X : œ 2.25 Subjects--Topical Terms: Revolutions.Socialism.Sociology. Dewey Class. No.: 322.42