Materia
G Geography (General)
GE Environmental Sciences
40
GF Human ecology. Anthropogeography
29
GB Physical geography
28
H Social Sciences (General)
15
S Agriculture (General)
12
T Technology (General)
11
HT Communities. Classes. Races
9
SD Forestry
9
GV Recreation Leisure
8
QL Zoology
8
GT Manners and customs
7
HC Economic History and Conditions
7
HN Social history and conditions. Social problems. Social reform
7
LB2300 Higher Education
7
SB Plant culture
7
GA Mathematical geography. Cartography
6
GC Oceanography
5
HB Economic Theory
5
JA Political science (General)
5
Q Science (General)
5
QH Natural history
5
SF Animal culture
5
GR Folklore
4
HF Commerce
4
L Education (General)
4
QH301 Biology
4
TC Hydraulic engineering. Ocean engineering
4
GN Anthropology
3
HD Industries. Land use. Labor
3
HM Sociology
3
HV Social pathology. Social and public welfare
3
TD Environmental technology. Sanitary engineering
3
CC Archaeology
2
D History (General)
2
E11 America (General)
2
F1201 Latin America (General)
2
HE Transportation and Communications
2
QE Geology
2
BX Christian Denominations
1
CB History of civilization
1
CD Diplomatics. Archives. Seals
1
HD28 Management. Industrial Management
1
HG Finance
1
HJ Public Finance
1
HQ The family. Marriage. Woman
1
JC Political theory
1
JF Political institutions (General)
1
JZ International relations
1
K Law (General)
1
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