Classification
302 - Social interaction
331 - Labor economics
44
300 - Social sciences
37
658 - General management
35
330 - Economics
25
500 - Natural sciences & mathematics
11
670 - Manufacturing
10
338 - Production
8
158 - Applied psychology
7
650 - Management & auxiliary services
7
150 - Psychology
5
384 - Communications; telecommunication
3
000 - Computer science, information & general works
1
011 - Bibliographies
1
155 - Differential & developmental psychology
1
170 - Ethics
1
306 - Culture & institutions
1
362 - Social welfare problems & services
1
380 - Commerce, communications & transportation
1
381 - Commerce
1
651 - Office services
1