1. Free Library of Philadelphia, Lewis E 245 Title: Fuero real Author: Alfonso X of Castile and Leon Place: Spain Date: 1255-1299
2. University of California, Berkeley, BANC MS UCB 172 Title: Privilege Author: Alfonso X of Castile and Leon Date: 1256 Oct. 24].
3. University of California, Berkeley, BANC MS UCB 151 Title: Chronicle Author: Alfonso X of Castile and Leon Place: Spain Date: between 1525 and 1541