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edicions
Canvis
sense resum d'edició
* ''Emperor of Culture. Alfonso X of Castile, the Learned and His Thirteenth-Century Renaissance'' (1990).{{sfn|Rodríguez Velasco|1991|pp=239-242}}
* ''Emperor of Culture. Alfonso X of Castile, the Learned and His Thirteenth-Century Renaissance'' (1990).{{sfn|Rodríguez Velasco|1991|pp=239-242}}
== Referències ==
== Enllaços externs ==
== Enllaços externs ==
* [https://es.wikipedia.org/wiki/Robert_Ignatius_Burns R.I. Burns en Wikipedia]
* [https://es.wikipedia.org/wiki/Robert_Ignatius_Burns R.I. Burns en Wikipedia]
[[Categoria:Biografies]]
[[Categoria:Biografies]]