Classification
P - Language and Literature
127,666
Q - Science
2,158
H - Social Science
1,923
K - Law
1,073
B - Philosophy, Psychology, Religion
968
D - World History
810
R - Medicine
573
J - Political Science
523
T - Technology
290
G - Geography, Anthropology, Recreation
172
S - Agriculture
172
N - Fine Arts
123
L - Education
102
A - General Works
88
M - Music
63
Z - Library Science
63
F - General American History
59
U - Military Science
30
C - Historical Sciences
27
E - United States History
13
V - Naval Science
13