Classification
D - World History
80
H - Social Science
43
Q - Science
37
S - Agriculture
36
P - Language and Literature
14
T - Technology
14
A - General Works
12
K - Law
11
Z - Library Science
11
G - Geography, Anthropology, Recreation
10
N - Fine Arts
8
L - Education
6
J - Political Science
5
B - Philosophy, Psychology, Religion
4
C - Historical Sciences
4
M - Music
4
R - Medicine
2
V - Naval Science
1