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Library of Congress Subject Areas
(1612)
A General Works
(8)
AC Collections. Series. Collected works
(5)
AS Academies and learned societies (General)
(3)
D History General and Old World
(1)
D History (General)
(1)
G Geography. Anthropology. Recreation
(8)
G Geography (General)
(2)
GE Environmental Sciences
(7)
H Social Sciences
(85)
H Social Sciences (General)
(20)
HB Economic Theory
(35)
HC Economic History and Conditions
(1)
HD Industries. Land use. Labor
(7)
HD28 Management. Industrial Management
(4)
HE Transportation and Communications
(2)
HF Commerce
(31)
HG Finance
(5)
HJ Public Finance
(3)
HM Sociology
(1)
HN Social history and conditions. Social problems. Social reform
(3)
HT Communities. Classes. Races
(2)
K Law
(4)
K Law (General)
(4)
L Education
(4)
L Education (General)
(4)
N Fine Arts
(2)
NC Drawing Design Illustration
(2)
P Language and Literature
(3)
PE English
(3)
Q Science
(249)
Q Science (General)
(140)
QA Mathematics
(1)
QD Chemistry
(16)
QK Botany
(44)
QL Zoology
(43)
QP Physiology
(1)
QR Microbiology
(40)
R Medicine
(55)
R Medicine (General)
(37)
RA Public aspects of medicine
(1)
RV Botanic, Thomsonian, and eclectic medicine
(16)
RX Homeopathy
(1)
S Agriculture
(1132)
S Agriculture (General)
(913)
SB Plant culture
(28)
SD Forestry
(2)
SF Animal culture
(203)
SH Aquaculture. Fisheries. Angling
(6)
T Technology
(305)
T Technology (General)
(172)
T201 Patents. Trademarks
(1)
TA Engineering (General). Civil engineering (General)
(20)
TD Environmental technology. Sanitary engineering
(1)
TJ Mechanical engineering and machinery
(16)
TP Chemical technology
(6)
TS Manufactures
(3)
TX Home economics
(89)