Hildegard von Bingen
References

 

Hildegard Publishing

Hildegard's Musical Notation
original hand-written score,
the Gregorian square note version,
and the modern printed versions

Hildegard von Bingen Biography
Hildegard Reference Page 
Hildegard Chant texts - Norma Gentile 
(the original Latin texts Hildegard wrote,and English translations)

Early Music and Chant Music Links

Early Music web site

Early Music Magazine (London)

Culture Kiosque - Germany

Lyrichord Discs (Early Music Series)