Classification
153 - Mental processes & intelligence
7
330 - Economics
6
300 - Social sciences
4
302 - Social interaction
4
650 - Management & auxiliary services
4
658 - General management
4
701 - Philosophy of fine & decorative arts
2
741 - Drawing & drawings
2
751 - Techniques, equipment, materials & forms
2
011 - Bibliographies
1
158 - Applied psychology
1
331 - Labor economics
1
380 - Commerce, communications & transportation
1
384 - Communications; telecommunication
1
500 - Natural sciences & mathematics
1