Classification
330 - Economics
363 - Other social problems & services
551 - Geology, hydrology & meteorology
333 - Economics of land & energy
22
700 - The arts; fine & decorative arts
16
000 - Computer science, information & general works
14
320 - Political science
14
600 - Technology
8
610 - Medicine & health
7
620 - Engineering & allied operations
7
140 - Specific philosophical schools
6
581 - Specific topics in natural history
6
900 - History & geography
6
380 - Commerce, communications & transportation
5
630 - Agriculture & related technologies
5
300 - Social sciences
4
340 - Law
4
370 - Education
4
580 - Plants (Botany)
3
720 - Architecture
3
170 - Ethics
2
414 - Phonology & phonetics
2
550 - Earth sciences
2
657 - Accounting
2
658 - General management
2
100 - Philosophy & psychology
1
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
400 - Language
1