Classification
S - Agriculture
63
H - Social Science
54
M - Music
40
D - World History
27
B - Philosophy, Psychology, Religion
16
P - Language and Literature
15
J - Political Science
13
A - General Works
12
Q - Science
9
Z - Library Science
8
L - Education
7
N - Fine Arts
4
T - Technology
4
K - Law
2
C - Historical Sciences
1
G - Geography, Anthropology, Recreation
1
R - Medicine
1