Classification
P - Language and Literature
1,333
H - Social Science
72
D - World History
38
Q - Science
27
L - Education
26
B - Philosophy, Psychology, Religion
25
R - Medicine
13
T - Technology
13
G - Geography, Anthropology, Recreation
10
K - Law
10
J - Political Science
9
S - Agriculture
8
N - Fine Arts
7
A - General Works
3
M - Music
3
U - Military Science
3
Z - Library Science
3
C - Historical Sciences
1