Classification
320 - Political science
580 - Plants (Botany)
630 - Agriculture & related technologies
000 - Computer science, information & general works
7
363 - Other social problems & services
7
333 - Economics of land & energy
6
551 - Geology, hydrology & meteorology
6
330 - Economics
5
600 - Technology
4
610 - Medicine & health
4
620 - Engineering & allied operations
4
581 - Specific topics in natural history
3
304 - Factors affecting social behavior
2
340 - Law
2
380 - Commerce, communications & transportation
2
700 - The arts; fine & decorative arts
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
300 - Social sciences
1
361 - Social problems & social welfare in general
1
520 - Astronomy & allied sciences
1
576 - Genetics & evolution
1
720 - Architecture
1
800 - Literature & rhetoric
1
900 - History & geography
1