Available from Hidegard Publishing Company, PO Box 332, Bryn Mawr, PA 19010. They sell her chants individually and in small sets.
TO ORDER / PARA COMPRAR partituras / musical scores / sheet music for Hildegard's chants, see Hidegard Publishing Company, or email sales@presser.com or call them at 610-592-1222 or fax 610-592-1229. Pueden enviar partituras a qualquier pais / they ship world-wide.

excerpted from "Lieder", published by Otto Muller Verlag, Salzburg in the 1950's. I don't know if it was reprinted - but it is available from many University and College Libraries

excerpted from "Hildegard of Bingen, Symphonia Harmonie Celestium Revelationum", published in modern facsimile by Alamire, POB 45, 3990 Peer, Belgium