Classification
P - Language and Literature
66,734
K - Law
1,826
Q - Science
919
H - Social Science
878
B - Philosophy, Psychology, Religion
619
D - World History
413
N - Fine Arts
301
R - Medicine
231
J - Political Science
183
T - Technology
168
L - Education
166
S - Agriculture
149
M - Music
114
F - General American History
112
G - Geography, Anthropology, Recreation
80
Z - Library Science
27
U - Military Science
24
A - General Works
22
C - Historical Sciences
22
E - United States History
12
V - Naval Science
6