Classification
320 - Political science
3
340 - Law
3
363 - Other social problems & services
3
551 - Geology, hydrology & meteorology
140 - Specific philosophical schools
1
333 - Economics of land & energy
1
581 - Specific topics in natural history
1
600 - Technology
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1