Subject
Operas
366
Songs (High voice) with piano
109
Score
86
Songs (High voice) with orchestra
75
Songs (Medium voice) with piano
63
Criticism and interpretation
41
Mathematics
38
Quantum theory
35
Oratorios
33
Germany History
30
Germany Politics and government
30
Philosophy
30
Cantatas, Sacred
28
United States Description and travel
28
Artists
26
Songs (Low voice) with piano
26
Choruses, Sacred (Mixed voices) with orchestra
25
Constitutional law
25
Psychoanalysis
25
Choruses, Secular (Mixed voices) with orchestra
24
History
23
Music
23
Passion music
23
Composers
21
Songs with piano
21
Ethics
19
German language
19
Holocaust, Jewish (1939-1945)
19
Management
19
Physics
19
Strategic planning
19
Administrative law
18
Aesthetics
18
Germany Foreign relations
18
Texas Description and travel
18
National socialism
17
Art, Modern
16
English language German
16
Germans
16
Mathematical physics
16
Phenomenology
16
Songs (Medium voice) with orchestra
16
Art
15
Economics
14
Songs (Low voice) with orchestra
14
World War, 1939-1945
14
German language English
13
Germany (West) Foreign relations
13
Indians of North America
13
Songs (High voice) with instrumental ensemble
13
more ...