Brown, Understanding Illuminated Manuscripts
The Middle English Breton Lays, ed. Laskaya
Exeter Book Riddles, edited and translated by Williamson.
The English Language in the Fourteenth Century, from Harvard's Chaucer pages.
The Great Vowel Shift, also from Harvard.
See and Hear the Great Vowel Shift, from Prof. Melinda Menzer at Furman University.
The BBC Version.
Middle English Pronouns from the University of Calgary.