Subject
Operas
1,173
Songs (High voice) with orchestra
182
Songs (High voice) with piano
72
Songs (Medium voice) with orchestra
56
Mathematics
44
Songs, Italian
36
Score
32
Vocal duets with orchestra
32
Songs (Medium voice) with piano
29
Songs (Low voice) with orchestra
22
Songs (High voice)
21
Madrigals, Italian
20
Popular music
20
Music
18
Astronomy
17
Diagnostic imaging
17
Oratorios
17
Songs (High voice) with instrumental ensemble
17
Mathematical analysis
16
Solo cantatas, Secular (High voice)
15
Medical radiology
14
Physics
14
Social security
14
Songs with piano
14
Mathematical physics
13
Criticism and interpretation
12
Part songs, Italian
12
Sacred songs (High voice) with orchestra
12
Songs (Low voice) with piano
12
Children
11
Italian language English
11
Probabilities
11
Mathematical statistics
10
Numerical analysis
10
Songs (Medium voice)
10
Differential equations, Partial
9
History
9
Mechanics
9
Astrophysics
8
Cosmology
8
English language Italian
8
Infants
8
Italian language
8
Musicals
8
Quantum theory
8
Radiography
8
Algebra
7
Cantatas, Secular
7
Choruses, Sacred (Mixed voices) with orchestra
7
Emergency medicine
7
more ...