Classification
900 - History & geography
28
330 - Economics
26
304 - Factors affecting social behavior
25
320 - Political science
19
333 - Economics of land & energy
10
949 - Other parts of Europe
8
341 - Law of nations
7
370 - Education
6
610 - Medicine & health
6
380 - Commerce, communications & transportation
5
340 - Law
4
363 - Other social problems & services
4
700 - The arts; fine & decorative arts
4
800 - Literature & rhetoric
3
300 - Social sciences
2
301 - Sociology & anthropology
2
070 - News media, journalism & publishing
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
327 - International relations
1
338 - Production
1
355 - Military science
1
364 - Criminology
1
600 - Technology
1
620 - Engineering & allied operations
1
791 - Public performances
1
920 - Biography, genealogy & insignia
1