MacKay, Angus, 1939- Spain in the Middle Ages : from frontier to empire, 1000-1500 / Angus MacKay. - London : Macmillan, 1977. - xviii, 245 p. : graph, maps ; 23 cm. - New studies in medieval history . Includes index. Bibliography: p. 213-229. Subjects--Geographic Terms: Spain--History--711-1516. LC Class. No.: DP99 / .M23 Dewey Class. No.: 946.02 M192S