About Maria Callas
In his foreword dated February 28, 1991, to John Ardoin's The Callas Legacy:  The Complete Guide to Her Recordings on Compact Disc, Terrence McNally wrote:  "Without her recordings, I wonder if Maria Callas would exist as forcefully in our hearts and imaginations as she does today.  Indeed, some twenty-five years after her last stage performance in 1965, and almost fifteen years after her death in 1977, Callas remains more vivid than most sopranos singing today."
LINKS
Maria Callas web site
johnrpierce.com Opera Pages
Andrea Chénier page
La Sonnambula page
Maria Callas on compact disc:  1949
1950
1951
John Ardoin's The Callas Legacy:  The Complete Guide to Her Recordings on Compact Disc can be bought used at amazon.com and at Powell's Books.
About
The Unknown Callas
Greek Fire at amazon.co.uk
Maria Callas aStore (U.S.)
Maria Callas aStore (U.K.)
Maria Callas aStore (Germany)
Maria Callas items at ebay.com
Callas albums at gemm.com
Bellini - NORMA (Naxos 8110325-27) with Maria Callas, Mario Filippeschi,
Ebe Stignani, Nicola Rossi-Lemeni, Chorus and Orchestra of Teatro
alla Scala conducted by Tullio Serafin. This 1954 recording has been released in a new transfer made from the best portions of two 1950s-
era British LP pressings which provide the most open and un-gimicked
sound of several editions previously available.

At
amazon.co.uk.
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The Callas Legacy: The Complete Guide to Her Recordings on Compact Disc, by John Ardoin, alibris.com icon
Maria Callas - Maria Callas: The Voice of the Century - Andrea Chenier, Act III, La mamma morta (USA)
Maria Callas - Maria Callas: The Voice of the Century - Andrea Chenier, Act III, La mamma morta