Classification
900 - History & geography
3
809 - History, description & criticism
2
100 - Philosophy & psychology
1
200 - Religion
1
300 - Social sciences
1
301 - Sociology & anthropology
1
302 - Social interaction
1
306 - Culture & institutions
1
320 - Political science
1
337 - International economics
1
338 - Production
1
580 - Plants (Botany)
1
940 - History of Europe
1