Classification
000 - Computer science, information & general works
320 - Political science
330 - Economics
551 - Geology, hydrology & meteorology
700 - The arts; fine & decorative arts
7
333 - Economics of land & energy
6
140 - Specific philosophical schools
4
363 - Other social problems & services
4
600 - Technology
2
610 - Medicine & health
2
300 - Social sciences
1
340 - Law
1
370 - Education
1
380 - Commerce, communications & transportation
1
550 - Earth sciences
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1