Materia
T Technology (General)
L Education (General)
79
LB2300 Higher Education
51
H Social Sciences (General)
49
HF Commerce
18
LC Special aspects of education
15
Q Science (General)
13
HB Economic Theory
11
HD28 Management. Industrial Management
11
TA Engineering (General). Civil engineering (General)
11
HD Industries. Land use. Labor
10
ZA Information resources
10
HG Finance
9
HM Sociology
9
LB Theory and practice of education
8
R Medicine (General)
7
ZA4050 Electronic information resources
7
G Geography (General)
6
LC5201 Education extension. Adult education. Continuing education
6
S Agriculture (General)
6
BF Psychology
5
HC Economic History and Conditions
5
K Law (General)
5
QA76 Computer software
5
GE Environmental Sciences
4
RA Public aspects of medicine
4
RA0421 Public health. Hygiene. Preventive Medicine
4
SF Animal culture
4
TC Hydraulic engineering. Ocean engineering
4
BJ Ethics
3
HE Transportation and Communications
3
HF5601 Accounting
3
LB1501 Primary Education
3
LB1603 Secondary Education. High schools
3
QR355 Virology
3
RT Nursing
3
TD Environmental technology. Sanitary engineering
3
HA Statistics
2
HN Social history and conditions. Social problems. Social reform
2
JA Political science (General)
2
LE Individual institutions (America except United States)
2
P Philology. Linguistics
2
PN Literature (General)
2
QL Zoology
2
RS Pharmacy and materia medica
2
RZ Other systems of medicine
2
SB Plant culture
2
T201 Patents. Trademarks
2
TK Electrical engineering. Electronics Nuclear engineering
2
V Naval Science (General)
2
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