An Economic Theory of the Feudal System: Towards a Model of the Polish Economy 1500-1800. By Witold Kula. Translated by Lawrence Garner. Introduction by Fernand Braudel. London and Atlantic Highlands, N.J.: NLB and Humanities Press, 1976 [Warsaw: Państwowe Wydawnictwo Naukowe, 1962]. 191 pp. $13.00.