Classification
581 - Specific topics in natural history
363 - Other social problems & services
9
333 - Economics of land & energy
7
600 - Technology
7
000 - Computer science, information & general works
6
330 - Economics
6
610 - Medicine & health
5
140 - Specific philosophical schools
4
630 - Agriculture & related technologies
4
658 - General management
4
320 - Political science
3
370 - Education
3
380 - Commerce, communications & transportation
3
551 - Geology, hydrology & meteorology
3
304 - Factors affecting social behavior
2
340 - Law
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
620 - Engineering & allied operations
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
297 - Islam, Babism & Bahai Faith
1
350 - Public administration & military science
1
364 - Criminology
1
500 - Natural sciences & mathematics
1
612 - Human physiology
1
657 - Accounting
1
800 - Literature & rhetoric
1