Signatura
Q - Science
49
T - Technology
46
H - Social Science
39
R - Medicine
31
S - Agriculture
26
P - Language and Literature
24
B - Philosophy, Psychology, Religion
19
D - World History
17
G - Geography, Anthropology, Recreation
15
A - General Works
13
F - General American History
13
L - Education
10
N - Fine Arts
9
J - Political Science
5
Z - Library Science
5
K - Law
3
C - Historical Sciences
1
M - Music
1