His El positivismo ... 1943.

Ensayos sobre filosofía en la historia, 1948: t.p. (Leopoldo Zea)

Filosofía sin más, 2008: t.p. (Leopoldo Zea) p. 142 (d. June 8, 2004)

Leopoldo Zea (1912-2004), 2012: p. 9, first sequence (b. June 30, 1912, Mexico City; d. June 4, 2004)

El positivismo en México: nacimiento, apogeo, y decadencia, 1968: flap (Leopoldo Zea (1912-2004) Leopoldo Zea (1912-2004) directed the Facultad de Filosofía y Letras of Philosophy and Letters of the UNAM from 1966 to 1970, during which time he founded the College of Latin American Studies. He was professor emeritus at UNAM)