Fletcher 1987. Fletcher, R. A. (1987). "Reconquest and Crusade in Spain c. 1050-1150". Transactions of the Royal Historical Society. 5. 37: 31–47. doi:10.2307/3679149. JSTOR3679149.
jstor.org
Fletcher 1987. Fletcher, R. A. (1987). "Reconquest and Crusade in Spain c. 1050-1150". Transactions of the Royal Historical Society. 5. 37: 31–47. doi:10.2307/3679149. JSTOR3679149.