@book{249501,
	author = {Haffner, Paul.},
	title = {Discourses of the popes from Pius XI to John Paul II to the Pontifical Academy of Sciences, 1936-1986.},
	publisher = {Pontificia Academia Scientiarum},
	year = {c1986.},
	series = {Pontificiae Academiae Scientiarum scripta varia},
	address = {Vatican City},
	note = {"English version edited by Fr. Paul Haffner"--Title page verso.}
}