Classification
363 - Other social problems & services
500 - Natural sciences & mathematics
330 - Economics
12
658 - General management
6
620 - Engineering & allied operations
5
331 - Labor economics
3
333 - Economics of land & energy
3
600 - Technology
3
700 - The arts; fine & decorative arts
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
332 - Financial economics
1
338 - Production
1
340 - Law
1
370 - Education
1
380 - Commerce, communications & transportation
1
400 - Language
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
800 - Literature & rhetoric
1
900 - History & geography
1