Classification
330 - Economics
333 - Economics of land & energy
3
363 - Other social problems & services
3
551 - Geology, hydrology & meteorology
600 - Technology
800 - Literature & rhetoric
000 - Computer science, information & general works
2
320 - Political science
2
700 - The arts; fine & decorative arts
2
140 - Specific philosophical schools
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
580 - Plants (Botany)
1
610 - Medicine & health
1
658 - General management
1