Classification
330 - Economics
900 - History & geography
6
320 - Political science
4
300 - Social sciences
3
140 - Specific philosophical schools
2
360 - Social problems & services; associations
2
361 - Social problems & social welfare in general
2
100 - Philosophy & psychology
1
340 - Law
1
380 - Commerce, communications & transportation
1
600 - Technology
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1