Discourses of the Popes from Pius XI to John Paul II to the Pontifical Academy of Sciences : 1936-1986. - Haffner, Paul, sac. (OLS)http://pul/name/2119; Pontificia Accademia delle scienze. (OLS)http://pul/name/1110 (ex Aedibus Academicis, 1986)
"English version edited by Fr. Paul Haffner".

The foreign investment debate : opening markets abroad or closing markets abroad at home? / Edited by Cynthia A. Beltz. - Beltz, Cynthia A. (OLS)http://pul/name/41841 (AEI Press, 1995)
"Based on the AEI conference on foreign investment and conditional national treatment held on July 18, 1994" (p. xiii).
Bibliografia: p. 125-136.