Frühmittelalterliche Studien.
Universität Münster.Institut für Frühmittelalterforschung.
Berlin :      W. de Gruyter,
1967-
RILA. Répertoire international de la littérature de l'art
MLA international bibliography of books and articles on the modern  languages and literatures (Complete edition)
Avery index to architectural periodicals. Second edition. Revised and enlarged. Supplement
"Jahrbuch des Instituts für Frühmittelalterforschung der Universität Münster."
Middle Ages