Classification
306 - Culture & institutions
331 - Labor economics
21
500 - Natural sciences & mathematics
21
330 - Economics
13
302 - Social interaction
10
658 - General management
8
300 - Social sciences
7
303 - Social processes
6
332 - Financial economics
4
338 - Production
4
384 - Communications; telecommunication
4
158 - Applied psychology
3
380 - Commerce, communications & transportation
2
381 - Commerce
2
650 - Management & auxiliary services
2
006 - Special computer methods
1
011 - Bibliographies
1
153 - Mental processes & intelligence
1
170 - Ethics
1
339 - Macroeconomics & related topics
1
371 - Schools & their activities; special education
1