Classification
100 - Philosophy & psychology
320 - Political science
170 - Ethics
2
300 - Social sciences
2
330 - Economics
2
363 - Other social problems & services
2
900 - History & geography
2
140 - Specific philosophical schools
1
193 - Philosophy of Germany & Austria
1
200 - Religion
1
333 - Economics of land & energy
1
551 - Geology, hydrology & meteorology
1
700 - The arts; fine & decorative arts
1