Classification
330 - Economics
72
333 - Economics of land & energy
5
363 - Other social problems & services
3
000 - Computer science, information & general works
1
303 - Social processes
1
304 - Factors affecting social behavior
1
331 - Labor economics
1
338 - Production
1
340 - Law
1
344 - Labor, social, education & cultural law
1
361 - Social problems & social welfare in general
1
500 - Natural sciences & mathematics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1
658 - General management
1
900 - History & geography
1