Classification
330 - Economics
380 - Commerce, communications & transportation
900 - History & geography
320 - Political science
5
200 - Religion
2
576 - Genetics & evolution
2
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
600 - Technology
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1