Classification
330 - Economics
361 - Social problems & social welfare in general
000 - Computer science, information & general works
3
320 - Political science
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
370 - Education
2
580 - Plants (Botany)
2
600 - Technology
2
630 - Agriculture & related technologies
2
140 - Specific philosophical schools
1
170 - Ethics
1
200 - Religion
1
304 - Factors affecting social behavior
1
340 - Law
1
380 - Commerce, communications & transportation
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1