||Snow 1977, no. 152: "The first large scale attempt to gather the growing mass of critical literature on Alfonso and his works. Contains over 600 entries, even with omissions (and some erroneously placed material). Especially valuable for editions, MSS, and the like. Approximately 40 entries deal with Alfonsine poetry (under "Alfonso" and the sub heading "Cantigas"). None of these is annotated. There is no index."