Classification
900 - History & geography
6
301 - Sociology & anthropology
3
363 - Other social problems & services
3
300 - Social sciences
1
320 - Political science
1
380 - Commerce, communications & transportation
1
400 - Language
1
410 - Linguistics
1
576 - Genetics & evolution
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1
780 - Music
1