Classification
330 - Economics
320 - Political science
35
333 - Economics of land & energy
27
304 - Factors affecting social behavior
20
610 - Medicine & health
19
363 - Other social problems & services
18
000 - Computer science, information & general works
16
340 - Law
15
380 - Commerce, communications & transportation
15
600 - Technology
15
300 - Social sciences
14
900 - History & geography
12
140 - Specific philosophical schools
11
700 - The arts; fine & decorative arts
11
620 - Engineering & allied operations
10
630 - Agriculture & related technologies
9
370 - Education
8
658 - General management
8
361 - Social problems & social welfare in general
6
551 - Geology, hydrology & meteorology
6
580 - Plants (Botany)
4
338 - Production
3
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
331 - Labor economics
1
332 - Financial economics
1
339 - Macroeconomics & related topics
1
343 - Military, tax, trade & industrial law
1
350 - Public administration & military science
1
400 - Language
1
530 - Physics
1
576 - Genetics & evolution
1
650 - Management & auxiliary services
1
657 - Accounting
1
720 - Architecture
1
791 - Public performances
1