Classification
320 - Political science
333 - Economics of land & energy
340 - Law
2
363 - Other social problems & services
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
330 - Economics
1
410 - Linguistics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
600 - Technology
1
610 - Medicine & health
1