Columbia subject headings:
Menéndez Pidal, Ramón, 1869-1968--Congresses.
Otero Pedrayo, Ramón, 1888-1976--Criticism and interpretation--Congresses.
Spanish philology--Congresses.
Harvard subject headings:
Menéndez Pidal, Ramón, 1869-1968--Criticism and interpretation--Congresses.
Otero Pedrayo, Ramón, 1888-1976--Criticism and interpretation--Congresses.
Princeton subject headings: