Bibliothèque nationale de France online catalog, Oct. 29, 2010 (hdg. in authority record: Thils, Gustave (1909-2000); other information in record: b. 1909 in Brussels; d. Apr. 12, 2000; Catholic priest and theologian; taught at Université de Louvain, Belgium)
Primauté pontificale et prérogatives épiscopales, 1961 t.p. (Gustave Thils) spine (G. Thils)