Classification
320 - Political science
333 - Economics of land & energy
2
363 - Other social problems & services
2
581 - Specific topics in natural history
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
170 - Ethics
1
200 - Religion
1
330 - Economics
1
340 - Law
1
600 - Technology
1
700 - The arts; fine & decorative arts
1