Classification
140 - Specific philosophical schools
330 - Economics
3
333 - Economics of land & energy
3
363 - Other social problems & services
580 - Plants (Botany)
658 - General management
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
2
600 - Technology
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
297 - Islam, Babism & Bahai Faith
1
320 - Political science
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
370 - Education
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1
900 - History & geography
1