Classification
P - Language and Literature
875
Q - Science
173
H - Social Science
86
B - Philosophy, Psychology, Religion
42
R - Medicine
32
T - Technology
29
D - World History
28
G - Geography, Anthropology, Recreation
26
L - Education
20
J - Political Science
10
M - Music
10
S - Agriculture
8
C - Historical Sciences
3
F - General American History
2
K - Law
2
N - Fine Arts
2
U - Military Science
2