Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
320 - Political science
363 - Other social problems & services
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
3
330 - Economics
2
600 - Technology
2
610 - Medicine & health
2
720 - Architecture
2
333 - Economics of land & energy
1
340 - Law
1
370 - Education
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
900 - History & geography
1