Classification
C - Historical Sciences
53
Q - Science
43
P - Language and Literature
25
R - Medicine
22
T - Technology
11
H - Social Science
7
D - World History
6
B - Philosophy, Psychology, Religion
4
S - Agriculture
3
A - General Works
2
K - Law
2
E - United States History
1
M - Music
1
N - Fine Arts
1
V - Naval Science
1