B1786. Amanda Holden, Ed. The Viking Opera Guide. England, Penguin Books, 1993. 1305pp. Indices; Illus.; DJ in mylar. - 0-670-81292-7
"Detailed, revelatory, and monumental, this remarkable guide is organized alphabetically by composer and embraces operatic forms ranging from monodies and masques through grand, tragic, and comic operas to operettas, modern music dramas, and a host of evergreen musicals."