Classification
333 - Economics of land & energy
2
361 - Social problems & social welfare in general
576 - Genetics & evolution
900 - History & geography
000 - Computer science, information & general works
1
300 - Social sciences
1
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
364 - Criminology
1
600 - Technology
1
610 - Medicine & health
1
620 - Engineering & allied operations
1