Classification
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940 - History of Europe
3
001 - Knowledge
2
120 - Epistemology, causation & humankind
2
305 - Social groups
2
306 - Culture & institutions
2
360 - Social problems & services; associations
2
540 - Chemistry & allied sciences
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
616 - Diseases
2
630 - Agriculture & related technologies
2
720 - Architecture
2
778 - Fields & kinds of photography
2
792 - Stage presentations
2
794 - Indoor games of skill
2
851 - Italian poetry
2
025 - Library operations
1
121 - Epistemology
1
152 - Perception, movement, emotions & drives
1
153 - Mental processes & intelligence
1
174 - Occupational ethics
1
230 - Christianity & Christian theology
1
282 - Roman Catholic Church
1
327 - International relations
1
339 - Macroeconomics & related topics
1
362 - Social welfare problems & services
1
364 - Criminology
1
395 - Etiquette (Manners)
1
398 - Folklore
1
401 - Philosophy & theory
1
414 - Phonology & phonetics
1
507 - Education, research & related topics
1
508 - Natural history
1
510 - Mathematics
1
519 - Probabilities & applied mathematics
1
530 - Physics
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
624 - Civil engineering
1
651 - Office services
1
659 - Advertising & public relations
1
668 - Technology of other organic products
1
759 - Historical, geographic & persons treatment
1
777 - [Unassigned]
1
781 - General principles & musical forms
1
786 - Keyboard & other instruments
1
853 - Italian fiction
1
907 - Education, research & related topics
1
954 - South Asia; India
1
966 - West Africa & offshore islands
1