Materia
H Social Sciences (General)
T Technology (General)
L Education (General)
8
HF Commerce
6
LB2300 Higher Education
6
HM Sociology
4
ZA Information resources
3
BF Psychology
2
HB Economic Theory
2
HC Economic History and Conditions
2
HD28 Management. Industrial Management
2
HG Finance
2
JA Political science (General)
2
B Philosophy (General)
1
GF Human ecology. Anthropogeography
1
HD Industries. Land use. Labor
1
HE Transportation and Communications
1
HN Social history and conditions. Social problems. Social reform
1
HV Social pathology. Social and public welfare
1
LB1603 Secondary Education. High schools
1
LT Textbooks
1
QA76 Computer software
1
QR Microbiology
1
TE Highway engineering. Roads and pavements
1