@book{67215,
	author = {Léon and Église catholique},
	title = {Lettres apostoliques de S. S. Léon XIII, encycliques, brefs, etc.},
	publisher = {A. Roger et F. Chernoviz},
	year = {1893-1904},
	address = {Paris},
	note = {Bons livres. Éditions exactes et belles},
	url = {http://gallica.bnf.fr/ark:/12148/bpt6k82365h}
}