Classification
338 - Production
27
330 - Economics
26
339 - Macroeconomics & related topics
7
332 - Financial economics
3
333 - Economics of land & energy
2
382 - International commerce
2
303 - Social processes
1
336 - Public finance
1
337 - International economics
1
352 - General considerations of public administration
1
362 - Social welfare problems & services
1
364 - Criminology
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1