These are the printed materials I have referred to when making up "The Annotated Amber", from top to bottom as one goes down that page:

Krulik, Theodore. Roger Zelazny. Ungar, New York, 1986.

Cresswell, J. "Deirdre." Dictionary of First Names. Bookmart Limited, London, 1995. p. 68-9.

"Deirdre." Encyclopedia Brittanica. 1969. Vol. 7. p. 181.

Priest, Harold M. Cliffs Notes on Spenser's The Faerie Queene. Cliffs Notes, Inc. Lincoln, Nebraska. 1968.