Classification
330 - Economics
8
300 - Social sciences
2
301 - Sociology & anthropology
2
320 - Political science
2
340 - Law
2
380 - Commerce, communications & transportation
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
333 - Economics of land & energy
1
370 - Education
1
610 - Medicine & health
1
900 - History & geography
1