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Buenos Aires Ediciones Peuser 1961 .
112 p. , Translation of: International conflict in the twentieth century.

By Dulles, John Foster.
Philadelphia .
xxii, 232 p.

By Leclercq, Jacques.
New York Hawthorn Books 1963 .
126, [1] p. , Translation of Le Chretien devant la planetarianism du monde. 21 cm..

By Soras, Alfred de..
New York Hawthorn Books 1963 .
128 p. 21 cm..

By Bosc, Robert.
Barcelona Editorial Estela 1962 .
415 p.