Columbia subject headings:
Benedictines--France--Correspondence.
Gilbert, de Gembloux, Abbot of Gembloux, approximately 1125-1213--Correspondence.
Harvard subject headings:
Benedictines--France--Correspondence.
Guibert, de Gembloux, Abbot of Gembloux, approximately 1125-1213--Correspondence.
Princeton subject headings:
Gembloux (Belgium)--Church history--Sources.
Hildegard, Saint, 1098-1179. Correspondence.