Classification
Q - Science
182
T - Technology
156
D - World History
94
H - Social Science
94
S - Agriculture
92
P - Language and Literature
75
A - General Works
47
R - Medicine
42
G - Geography, Anthropology, Recreation
30
B - Philosophy, Psychology, Religion
25
L - Education
22
N - Fine Arts
20
Z - Library Science
19
K - Law
15
J - Political Science
11
C - Historical Sciences
8
M - Music
8
E - United States History
3
F - General American History
3
U - Military Science
2
V - Naval Science
2