Classification
520 - Astronomy & allied sciences
700 - The arts; fine & decorative arts
6
333 - Economics of land & energy
4
320 - Political science
3
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
600 - Technology
3
000 - Computer science, information & general works
2
330 - Economics
2
658 - General management
2
100 - Philosophy & psychology
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
370 - Education
1
500 - Natural sciences & mathematics
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
620 - Engineering & allied operations
1