Classification
P - Language and Literature
20,778
Q - Science
754
H - Social Science
484
K - Law
410
B - Philosophy, Psychology, Religion
304
D - World History
222
J - Political Science
146
R - Medicine
114
T - Technology
103
S - Agriculture
51
A - General Works
42
G - Geography, Anthropology, Recreation
32
N - Fine Arts
31
L - Education
30
M - Music
17
Z - Library Science
16
F - General American History
13
C - Historical Sciences
10
U - Military Science
9
E - United States History
3
V - Naval Science
3