By Morales, Jorge Luis.
Río Piedras, P.R. Ediciones La Torre, Univesidad de Puerto Rico, 1960 .
98 p.

By Toynbee, Arnold Joseph, | Toynbee, Arnold J..
Rio Piedras, P.R. Ediciones La Torre, Universidad de Puerto Rico 1963 .
88 p. , Traduccion de Jose Ma. Bulnes. | The Weatherhead Foundation lectures, delivered at the University of Puerto Rico in Feb., 1962.

By Machado, Antonio.
Río Piedras] Ediciones La Torre | Universidad de Puerto Rico 1961 .
105 p. , Eleven articles previously published in La Caricatura, nine of which were written in collaboration with Manuel Machado y Ruiz. 25 cm..

By Bayón, Damián Carlos..
Río Piedras Ediciones La Torre, Editorial Universitaria, Universidad de Puerto Rico 1965 .
205 p.

By Ferdinandy, Miguel de..
[Río Piedras, P.R.] Ediciones La Torre 1961 .
2v.

By Ferdinandy, Miguel de..
[Río Piedras, P.R.] Ediciones La Torre 1961 .
216p.