Classification
363 - Other social problems & services
551 - Geology, hydrology & meteorology
333 - Economics of land & energy
9
330 - Economics
7
000 - Computer science, information & general works
6
320 - Political science
6
700 - The arts; fine & decorative arts
6
140 - Specific philosophical schools
5
370 - Education
5
380 - Commerce, communications & transportation
5
600 - Technology
4
610 - Medicine & health
4
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
100 - Philosophy & psychology
1
170 - Ethics
1
200 - Religion
1
300 - Social sciences
1
304 - Factors affecting social behavior
1
340 - Law
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
630 - Agriculture & related technologies
1
658 - General management
1
720 - Architecture
1
900 - History & geography
1