Classification
338 - Production
10
320 - Political science
6
306 - Culture & institutions
4
330 - Economics
4
332 - Financial economics
4
701 - Philosophy of fine & decorative arts
4
940 - History of Europe
4
303 - Social processes
3
327 - International relations
3
700 - The arts; fine & decorative arts
3
809 - History, description & criticism
3
333 - Economics of land & energy
2
337 - International economics
2
363 - Other social problems & services
2
509 - Historical, geographic & persons treatment
2
709 - Historical, geographic & persons treatment
2
907 - Education, research & related topics
2
945 - Italian Peninsula & adjacent islands
2
951 - China & adjacent areas
2
070 - News media, journalism & publishing
1
146 - Naturalism & related systems
1
302 - Social interaction
1
305 - Social groups
1
323 - Civil & political rights
1
331 - Labor economics
1
335 - Socialism & related systems
1
336 - Public finance
1
339 - Macroeconomics & related topics
1
340 - Law
1
341 - Law of nations
1
342 - Constitutional & administrative law
1
353 - Specific fields of public administration
1
355 - Military science
1
362 - Social welfare problems & services
1
368 - Insurance
1
370 - Education
1
382 - International commerce
1
394 - General customs
1
510 - Mathematics
1
610 - Medicine & health
1
612 - Human physiology
1
616 - Diseases
1
720 - Architecture
1
724 - Architecture from 1400
1
770 - Photography, photographs & computer art
1
779 - Photographs
1
780 - Music
1
781 - General principles & musical forms
1
791 - Public performances
1
792 - Stage presentations
1
more ...