Encyclopaedia of the social sciences / Edited by Edwin R. A. Seligman and Alvin Johnson. - New York : Macmillan, c 1967. - Vols. ; 27 cm. V. 9- Laboulaye-Machine, Political ; 87 87 Subjects--Topical Terms: Social science.--Encyclopaedia Dewey Class. No.: 303 / E19