n categories: A. Larger Works; B. Works for Choir; C. Piano etc.; D. Songs; E. Organ; F. Hymns and Sacred Works; 
          and G. Miscellaneous. For Richard Hove’s <em>J.P.E. Hartmann</em> (1934) the music bibliographer and head of department, 
          Alfred Nielsen, prepared a systematic catalogue subdivided into eleven categories: I. Operas; II. Plays and Ballets; III. Orchestral Works; 
          IV. Cantatas and Larger Works for Choir; V. Polyphonic Songs and Smaller Works for Choir; VI. Unison