ML 60.W3713 Weiss, Piero. Letters of Composers through Six Centuries. Thematic indexes of composers' works are also helpful. Thematic Catalogue of the Works of Carl Philipp Emanuel Bach. Hoboken, Anthony van.
Thematic indexes can also be incorporatedin scholarly biographies of composers.
Be sure to look carefully in Sage for notes about thematic indexes, bibliographies, etc. Also consult New Grove lists of works and bibliographies. Miscellaneous German Terms Used in Thematic Catalogs, etc. An online index to over 1600 journals covering a variety of subject areas. A good way to gain access to recent materials as well as more general journals that may not be indexed in Music Index .