Classification
338 - Production
5
330 - Economics
4
320 - Political science
3
331 - Labor economics
2
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
303 - Social processes
1
304 - Factors affecting social behavior
1
327 - International relations
1
332 - Financial economics
1
333 - Economics of land & energy
1
339 - Macroeconomics & related topics
1
388 - Transportation; ground transportation
1