Classification
330 - Economics
320 - Political science
94
900 - History & geography
38
576 - Genetics & evolution
10
340 - Law
4
400 - Language
4
300 - Social sciences
3
370 - Education
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
001 - Knowledge
1
200 - Religion
1
333 - Economics of land & energy
1
500 - Natural sciences & mathematics
1
510 - Mathematics
1
519 - Probabilities & applied mathematics
1
630 - Agriculture & related technologies
1
658 - General management
1
973 - United States
1