Found in the Print Reference section on the left hand side of the first floor -- toward the back windows.

The Dictionary of Art  editor, Jane Turner REF N31 .D5 1996 (34 volumes)

available online as part of Oxford Art Online

Dictionary of artists / Benezit First English-language edition of Emmanuel Bénézit's Dictionnaire critique et documentaire des peintres, sculpteurs, dessinateurs et graveurs, based on the 14-volume French edition published in 1999. It has been revised, adapted and updated.--Preface REF N40 .B4713 2006 (14 volumes)