Classification
100 - Philosophy & psychology
500 - Natural sciences & mathematics
170 - Ethics
1
300 - Social sciences
1
301 - Sociology & anthropology
1
320 - Political science
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
370 - Education
1
610 - Medicine & health
1
700 - The arts; fine & decorative arts
1