Classification
300 - Social sciences
330 - Economics
700 - The arts; fine & decorative arts
320 - Political science
3
900 - History & geography
3
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
170 - Ethics
1
363 - Other social problems & services
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1