Classification
361 - Social problems & social welfare in general
600 - Technology
7
620 - Engineering & allied operations
630 - Agriculture & related technologies
000 - Computer science, information & general works
5
140 - Specific philosophical schools
2
380 - Commerce, communications & transportation
2
580 - Plants (Botany)
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
300 - Social sciences
1
360 - Social problems & services; associations
1
363 - Other social problems & services
1
364 - Criminology
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
900 - History & geography
1