San Pedro de Cardeña
| Author(s) | Title | Reference | |
|---|---|---|---|
| P.E. Russell | SAN PEDRO DE CARDEÑA AND THE HEROIC HISTORY OF THE CID | 27/2, p. 57 |
| Author(s) | Title | Reference | |
|---|---|---|---|
| Claude Jenkins | Cardinal Gasquet as an Historian. (The Creighton Lecture in History, 1956), by M. D. Knowles | 26/2, p. 134 |