Classification
330 - Economics
63
300 - Social sciences
20
340 - Law
13
100 - Philosophy & psychology
5
320 - Political science
5
331 - Labor economics
5
370 - Education
5
658 - General management
5
140 - Specific philosophical schools
3
170 - Ethics
3
600 - Technology
3
304 - Factors affecting social behavior
2
338 - Production
2
363 - Other social problems & services
2
581 - Specific topics in natural history
2
670 - Manufacturing
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
174 - Occupational ethics
1
305 - Social groups
1
500 - Natural sciences & mathematics
1
800 - Literature & rhetoric
1
900 - History & geography
1
973 - United States
1