Signatura
S - Agriculture
1,005
T - Technology
632
Q - Science
142
A - General Works
112
H - Social Science
101
L - Education
21
G - Geography, Anthropology, Recreation
14
Z - Library Science
14
N - Fine Arts
10
B - Philosophy, Psychology, Religion
9
J - Political Science
8
P - Language and Literature
7
R - Medicine
7
K - Law
4
F - General American History
3
C - Historical Sciences
1
D - World History
1
U - Military Science
1