Since the Hartfield Library uses the LC Classification System, it would be to your benefit to learn the two letter representations of the topics that relate to your topic.

A. General Works
B-BJ. Philogophy, Psychology
BL, BM, BP, BQ. Religion: Religions, Hinduism, Judaism, Islam, Buddhism
BR-BV. Religion: Christianity, Bible
BX. Religion: Christian Denominations
C. Auxiliary Sciences of History
D-DJ. History (General), History of Europe, Part 1
DL-DR. History of Europe, Part 2
DJK-DK. History of Eastern Europe (General), Soviet Union, Poland
DS. History of AsiaDT-DX. History of Africa, Australia, New Zealand, etc.
E-F. History: America (Western Hemisphere)
G. Geography. Maps. Anthropology. Recreation.
H-HJ. Social Sciences: Economics
HM-HX. Social Sciences: SociologyJ. Political Science
K. Law (General)KD. Law of the United Kingdom and Ireland
KDZ, KG-KH. Law of the Americas, Latin America and the West Indies
KE. Law of Canada
KF. Law of the United States
KJ-KKZ. Law of Europe
KJV-KJW. Law of France
KK-KKC. Law of GermanyL. Education
M. Music
N. Fine Arts
P-PA. General Philology and Linguistics, Classical Languages
PA Supplement. Byzantine & Modern Greek Literature, Medieval & Latin Lit.
PB-PH. Modern European Languages
PG. Russian Literature
P-PK. Oriental Philology and Literature, Indo-Iranian Philology & Lit.
PL-PM Languages of Eastern Asia, Africa, Oceania, Hyperborean, Indian, and Artificial Languages
P-PM Supplement. Index to Languages and Dialects
PN, PR, PS, PZ. General Literature. English and American Literature. Fiction in English Juvenile belles letters.
PQ, Part 1. French Literature
PQ, Part 2. Italian, Spanish, and Portuguese Literatures
PT, Part 1. German Literature
P-PZ. Language and Literature Tables
Q. ScienceR. Medicine
T. Technology
U. Military Science
V. Naval Science
Z. Bibliography. Library Science