Studi su Innocenzo 3. - Maccarrone, Michele, <mons., 1913-1993>. (OLS)http://semarc/name/2256 (Antenore, 1972)
Keywords: Innocenzo III <papa; 1161-1216>. (OLS)http://semarc/subject/4923; Crociate. (OLS)http://semarc/subject/1433