Classification
330 - Economics
44
333 - Economics of land & energy
9
900 - History & geography
9
320 - Political science
7
000 - Computer science, information & general works
5
380 - Commerce, communications & transportation
5
301 - Sociology & anthropology
4
610 - Medicine & health
4
700 - The arts; fine & decorative arts
4
140 - Specific philosophical schools
3
200 - Religion
3
363 - Other social problems & services
3
370 - Education
3
400 - Language
3
300 - Social sciences
2
322 - Relation of state to organized groups
2
338 - Production
2
340 - Law
2
630 - Agriculture & related technologies
2
303 - Social processes
1
304 - Factors affecting social behavior
1
339 - Macroeconomics & related topics
1
410 - Linguistics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
711 - Area planning
1
780 - Music
1
869 - Portuguese literature
1
967 - Central Africa & offshore islands
1