Bibliography of bibliographic sources:

Beethoven-Bibliographien. Compiled by Karl Stock, Rudolf Heilinger, Marylene Stock. Graz: Selbstverlag Stock & Stock, 1986. 78 pp.

Includes 385 citations for works up to 1985 containing Beethoven bibliographies. Indexed by title and editor.

Annotated bibliography:

Beethoven Abstracts. Compiled and annotated by Donald MacArdle, but completed and edited after his death in 1964 by Sonja Pogodda. Detroit: Information Associates, 1973. 432 pp.

Lots of problems here, but a useful annotated bibliography all the same. Abstracts primary and secondary periodicals.

Computer bibliography:

Beethoven Gateway. Co-directed by William Meredith and Patricia Stroh at the Ira F. Brilliant Center for Beethoven Studies, San Jose State University. 1990 - .

The Beethoven Gateway is designed to be a comprehensive, computer-based Beethoven bibliography with enhanced online search capabilities. Over 14,000 bibliographic records have been entered to date.