Classification
170 - Ethics
320 - Political science
100 - Philosophy & psychology
3
333 - Economics of land & energy
2
363 - Other social problems & services
2
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
200 - Religion
1
301 - Sociology & anthropology
1
330 - Economics
1
340 - Law
1
370 - Education
1
380 - Commerce, communications & transportation
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1