Classification
330 - Economics
4
700 - The arts; fine & decorative arts
4
333 - Economics of land & energy
3
000 - Computer science, information & general works
2
340 - Law
2
380 - Commerce, communications & transportation
2
530 - Physics
2
576 - Genetics & evolution
2
600 - Technology
2
140 - Specific philosophical schools
1
300 - Social sciences
1
320 - Political science
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
500 - Natural sciences & mathematics
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1