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B - Filosofia, Psicologia, Religió
1,831
H - Social Science
229
K - Law
197
J - Political Science
177
L - Education
155
P - Language and Literature
140
Q - Science
130
N - Fine Arts
64
A - Treballs generalss
59
F - General American History
54
D - World History
39
C - Historical Sciences
26
G - Geography, Anthropology, Recreation
24
T - Technology
17
R - Medicine
15
M - Music
12
Z - Library Science
5
E - United States History
4
S - Agriculture
4
U - Military Science
3