By Palacios, Leopoldo Eulogio..
Madrid Editorial Gredos 1962

By Palacios, Leopoldo Eulogio..
Madrid Ediciones Rialp 1952 .
153 p.

By Palacios, Leopoldo Eulogio..
Madrid Instituto de Estudios Políticos 1946 .
212 p.

By Palacios, Leopoldo Eulogio..
Madrid Ed. Rialp 1957 .
169 p.

By Palacios, Leopoldo Eulogio..
Madrid Rialp 1960 .
88 p.

By Palacios, Leopoldo Eulogio..
Madrid Editorial Gredos 1974 .
454 p. 8424920996

By Schopenhauer, Arthur,.
Madrid Editorial Gredos 1981 .
230 p. 19 cm..
8424901002

Madrid Ediciones Rialp 1989 , Includes bibliographies.