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類號 類 別
A- General works
B- Philosophy, Psychology, Religion
C- Auxiliary Sciences of History
D- History : General & Outside the Americas
E- History : United States
F- History : United States Local & America
G- Geography, Anthropology, Recreation
H- Social Sciences
J- Political Science
K- Law
L- Education
M- Music
N- Fine Arts
P - Language and Literature
Q - Science
R - Medicine
S - Agriculture
T - Technology
U - Military Science
V- Naval Science
Z- Library Science & Information Resources