Classification
363 - Other social problems & services
333 - Economics of land & energy
21
000 - Computer science, information & general works
17
320 - Political science
15
551 - Geology, hydrology & meteorology
15
700 - The arts; fine & decorative arts
15
330 - Economics
14
610 - Medicine & health
11
380 - Commerce, communications & transportation
9
600 - Technology
9
630 - Agriculture & related technologies
9
900 - History & geography
8
304 - Factors affecting social behavior
7
370 - Education
6
576 - Genetics & evolution
6
580 - Plants (Botany)
6
581 - Specific topics in natural history
5
620 - Engineering & allied operations
5
336 - Public finance
3
720 - Architecture
3
100 - Philosophy & psychology
2
340 - Law
2
414 - Phonology & phonetics
2
540 - Chemistry & allied sciences
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
200 - Religion
1
300 - Social sciences
1
301 - Sociology & anthropology
1
327 - International relations
1
400 - Language
1
500 - Natural sciences & mathematics
1