Medieval heresies a bibliography 1960-1979 - Berkhout, Carl T. (OLS)http://semarc/name/75204; Russell, Jeffrey Burton <1934->. (OLS)http://semarc/name/25579 (Pontifical institute of Mediaeval studies,, 1981)
Keywords: Eresie - Sec. 8.-15. - Bibliografie. (OLS)http://semarc/subject/39454; Eretici - Sec. 8.-15. - Bibliografie. (OLS)http://semarc/subject/39455