Signatura
N - Fine Arts
53
F - General American History
49
D - World History
44
M - Music
39
P - Language and Literature
30
C - Historical Sciences
19
H - Social Science
18
T - Technology
13
G - Geography, Anthropology, Recreation
7
Z - Library Science
7
K - Law
5
E - United States History
4
J - Political Science
4
L - Education
4
B - Philosophy, Psychology, Religion
2
R - Medicine
2
S - Agriculture
1
U - Military Science
1