Materia
G Geography (General)
GB Physical geography
24
GE Environmental Sciences
23
GF Human ecology. Anthropogeography
20
S Agriculture (General)
10
H Social Sciences (General)
8
HT Communities. Classes. Races
8
GV Recreation Leisure
7
GA Mathematical geography. Cartography
6
GT Manners and customs
6
HN Social history and conditions. Social problems. Social reform
6
LB2300 Higher Education
5
T Technology (General)
5
HC Economic History and Conditions
4
L Education (General)
4
Q Science (General)
4
TC Hydraulic engineering. Ocean engineering
4
GC Oceanography
3
GN Anthropology
3
HM Sociology
3
SD Forestry
3
E11 America (General)
2
GR Folklore
2
HB Economic Theory
2
QE Geology
2
QL Zoology
2
SB Plant culture
2
D History (General)
1
F1201 Latin America (General)
1
HE Transportation and Communications
1
HF Commerce
1
HG Finance
1
HV Social pathology. Social and public welfare
1
LC Special aspects of education
1
NX Arts in general
1
P Philology. Linguistics
1
QH301 Biology
1
R Medicine (General)
1
TD Environmental technology. Sanitary engineering
1
VM Naval architecture. Shipbuilding. Marine engineering
1
ZA Information resources
1