Classification
363 - Other social problems & services
330 - Economics
7
333 - Economics of land & energy
7
610 - Medicine & health
6
000 - Computer science, information & general works
5
551 - Geology, hydrology & meteorology
4
658 - General management
4
700 - The arts; fine & decorative arts
4
580 - Plants (Botany)
3
100 - Philosophy & psychology
2
140 - Specific philosophical schools
2
320 - Political science
2
380 - Commerce, communications & transportation
2
600 - Technology
2
630 - Agriculture & related technologies
2
361 - Social problems & social welfare in general
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
540 - Chemistry & allied sciences
1
620 - Engineering & allied operations
1
720 - Architecture
1
900 - History & geography
1