Classification
330 - Economics
55
331 - Labor economics
10
338 - Production
5
332 - Financial economics
4
380 - Commerce, communications & transportation
4
336 - Public finance
2
363 - Other social problems & services
2
658 - General management
2
304 - Factors affecting social behavior
1
306 - Culture & institutions
1
364 - Criminology
1
383 - Postal communication
1