Jáuregui, Juan, and Velado, Bernardo
Menéndez Pidal, Ramón
Morton, J.B.
Parsons, W.R. (William), and (ill.)Mould, Shelley
Quintana, Marta
Sankt Jakobus-Bruderschaft Düsseldorf
Starkie, Walter (illustrated by Arthur Rackham)
Tuna de Derecho
Tuna de Peritos de Jaen
Tuna Universitaria Compostelana