Signum
P - Language and Literature
1 844
M - Music
665
D - World History
101
G - Geography, Anthropology, Recreation
79
N - Fine Arts
74
B - Philosophy, Psychology, Religion
44
H - Social Science
32
L - Education
19
Z - Library Science
13
A - General Works
7
T - Technology
6
K - Law
5
C - Historical Sciences
3
S - Agriculture
3
J - Political Science
1
R - Medicine
1
U - Military Science
1